look up any word, like fleek:
 
1.
A much more intense way of the popular 'Hell Yeah' phrase.
'Dude, that was awesome!'
'Shit yeah!'
by Clayton Bigsby White Power May 15, 2007
 
2.
the best possible way affirmative response
"Do you want to come over for chicken and dumplings?"

"Shit yeah, I do."
by mrs. khalil greene July 14, 2008
 
3.
The most emphatic affirmative answer a human can possibly give.
"My homie asked me if we should hit the club on friday night and i was all: shityeah, fool!"
by Reckless Reid November 17, 2008
 
4.
1) a very enthusiastic way of agreeing.
2) exclaiming that you have forgotten something
person 1 "dude, are you pumped?"
person 2 "SHIT YEAH!"

or

person 1 "we need *extra item here*"
person 2 "shit yeah ! i'll get that!"

shityeah
by kb6011 December 30, 2010