Approximately the same idea as "just messing with you."
Did you know that I met the president? Nah, not seriously, I'm just shitting on your face!
by Jorge Juan de Fuca January 5, 2010
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It is a street slang. You stand up and shit her/his face means "shit up your face"
- you smell like a shit, did some1 shit up your face?
- yeah thats why i hate 69 position all the time!
by abuzettin imanikilli June 17, 2009
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Bro 1. "Come at me, bro ."

Bro 2. "Don't even try me, bro. i will shit in your face ."
by Mouse~ September 19, 2013
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To open one's mouth and have incoherent garmble escape will little or no understandable meaning.

Can be likened to when a person combines two words on accident becuase they are thinking one and trying to say the other.
In response to a sentence that makes no sense : "You just shit your face man. Clean that up and talk to me when you're not a retard."

If someone frequently shits their face, they can be called a face shitter.
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