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1.
pronounced - 'hill - aero - pie'

A witty combination of something intensely comically pleasing yet can also be used to refer and abuse a particular stupid individual.
Clive: OUCH, just stood on that plug!
Bruce: Mate, i saw.. it was fucking hilaropai!

Clive: This girl in my class asked me how to spell pig..
Bruce: How ironic, shes a f*cking hilaropai!
by wils0n December 14, 2010