A. a noun (like pooping, poop, etc)
b. an exclamation (in anger, sadness, happiness, or when something goes horribly wrong)
c. when the word "Holy" is placed on front of it it becomes an expression (like in place of oh my god or something)
d. it can express an amount when "load" is placed after. (an extremely large amount or an extremely small amount)
e. and it can explain 'everything' or 'stuff' in a more expressing way
its most commonly used to make a sentence sound more exciting or more interesting that it normally is. for example.
"the neighbors dog just shit on my lawn"
sounds more interesting than
"the neighbors dog pooped on my lawn"
the word 'crap' can also be used the same way as 'shit' can.
B. Shit dude that sucks. or. Shit dude that's awesome!
c. holy shit thats a small ass computer
d. that's a shitload of weed man...
e. you wont believe the shit that happened to me today
Man in Elevator: S.H.I.T.
Woman looks at him blankly: what did you say?
Man: Sorry Hon its Thursday.