something of inferior quality or a person or pet worthy of little regard
Tahoe (pet dog), stop pissin on the rug you little shitbreather!
by Benjamin Giggles January 27, 2003
some one who is a complete fucking fag, and likes to smoke shit
Mike: Man Matt, you are a complete shit breather, why dont you go fuck yourself
by Mike September 05, 2004
someone thats breath smells like they just a a pound of baby shit.
i woke up in the morning next to my boyfriend and i was like " damn boo you must be a shit breather!"
by Chloe is orgasmic January 14, 2011