Shit On My Ass (etymology: Mod. English; portmaneau of the phrases "shit" and "ass," with "on my" forming the liaison) is a vulgar phrase expressing an utter discontent in an occurence, (e.g. where the conjuction "Shit!" would be used). Offshoots may include: shit on my dick, shite on my arse, holy shit on my ass, and the extremely long "piece of shit motherfucker on my ass."
Teacher: You failed the test, Stan.
Stan: Shit on my ass!
Brittany: I'm cheating on you, Stan.
Stan: You piece of shit motherfucker on my ass!
Stan: Shit on my ass!
Brittany: I'm cheating on you, Stan.
Stan: You piece of shit motherfucker on my ass!
by ceaseanddesistsir April 9, 2010
Get the Shit On My Ass mug.problem with someone or something that needs to be taken care of or gotten rid of, better if done earlier than later before it spreads everywhere
Wife: I just spent $300 on knick knacks!
Husband: (mutters to himself) fucking bitch is shit on my ass
Husband: (mutters to himself) fucking bitch is shit on my ass
by R Morris August 31, 2006
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by Jim Von Hagen June 9, 2008
Get the Shit on my ass mug.by Sevendusterino March 9, 2009
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