(Shamelessly stolen from an imgur dump, but I felt like it belongs here)
Edit:
Since so many of you suggested additions, I’m just going to list them all in one place. Let’s create a community-made enzycrapedia of shit-related terms and phrases!
Transcription of the image in case the picture disappears:
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Dogshit: Very poor quality 
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Bullshit: Not true 
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Horseshit: Nonsense 
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Apeshit: rambunctious 
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Batshit: insane 
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Chickenshit: coward 
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Ratshit: poor quality 
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No shit: obviously (also sometimes “No shit, Sherlock!” as an exclamation) 
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Holy shit: mind blowing / unbelievable 
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Hot shit: very good 
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Dipshit: a total dumbass 
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Tuff shit: take it or leave it. (correct spelling would be “tough shit”) 
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Jack shit: nothing 
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The shit: perfection 
More shit:
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Cut the shit: knock it off. 
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Are you shitting me: are you serious. 
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This shit is bananas: this is crazy. 
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That’s my shit: I really like that. 
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I dig that shit: I love it 
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Shit!: An exclamation of discontent. See also: fuck. 
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I shit myself: I pooped my pants. 
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Shit-Hawk: unpleasant person 
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For shits and giggles: Doing something silly for no particular reason 
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Shit a brick: to be scared 
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Scared shitless: being really scared 
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Shitstain: someone trashy or worthless 
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Shit for brains: stupid 
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Shit sandwich: a shitty situation 
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Shithead: a shitty person 
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Shithole: a shitty place 
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Piece of shit: a shitty thing 
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Deep shit: a meaningful revelation 
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To be up shit creek (without a paddle): to be in deep trouble 
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To be full of shit: constantly lying 
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Shit Stirrer: someone who deliberately causes problems/arguments 
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Get your shit together: to organize stuff properly (alternatively; to calm down) 
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Losing your shit: freaking out 
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To [do] the shit out of something: doing something in an excellent way 
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I don’t give a shit: I don’t care 
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When shit hits the fan: when an already bad situation suddenly becomes worse 
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Shit happens: bad things happen and you can’t do anything about it 
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Shit just got real: Something dangerous is happening right now 
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Does a bear shit in the woods?: Isn’t it obvious? 
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Eat shit: To fall on your face 
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Shit-eating grin: a smug and condescending expression 
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Who shit in your cereal?: Who ruined your day/mood? 
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(To watch the) Shitshow: watching utter chaos unfold without intervening 
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A metric shit ton: a lot 
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Shit on a Shingle: a dish consisting of a cream sauce with meat in it poured over toast 
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Nuttier than squirrel shit: being crazy 
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Shitstorm: a stressful, chaotic situation 
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You don’t know shit: you’re clueless 
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Don’t shit where you eat: Don’t date a work colleague 
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The shits: diarrhea 
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My shit: my stuff 
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Shitter: toilet 
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You are shit: you’re worthless 
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You are not shit: reassuring that you’re NOT worthless 
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You ain’t shit: you’re worse than worthless 
Thanks and credit to: Poopmeister, Wogi, protist, cloudy1999, lambchop and ToRa


There’s more!
Cut the shit: knock it off.
Are you shitting me: are you serious.
This shit is bananas: this is crazy.
That’s my shit: I really like that.
Shit!: An exclamation of discontent. See also: fuck.
I shit myself: I pooped my pants.
A shit in the hand is worth two in the bush: this is a joke, it doesn’t mean anything. I only include it because a guy came up to me at work and asked what it meant.