Top Definition
A person who remains knowingly and rudely ignorant of social norms and generally accepted civil behavior.
Pignoramous is a person who: Walks in a bike lane; pushes their baby in stroller across a busy street while the traffic light is still red; cuts in line; acts like they don't know the rules when they really do! Essentially, a person who takes advantage of the system and disregards any respect for others through their selfish actions.
by Danielf1818 September 11, 2012

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