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Any person who is incapable of consuming as much alcohol as you can. Generally someone who has arrogantly been boasting about how much alcohol they can consume but then falls far short of the trumped up expectations
He was shit faced on 2 pints - the piss ant.
by Georgie Burgess June 02, 2005
Corky Romano; My cousin Diego
My cousin Diego is a piss ant and he looks like Corky Romano.
by Word up my brotha August 27, 2003
a very emoish psychotic girl who is obsessed with Baltimore.
"piss ant is such a biotch"
by Kelly October 03, 2003