One who has fellated a shitcock.
Ben just sucked my shit cock. That kid is such a shitbreather.
by Anonymous January 28, 2003
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