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1. An adjective used to describe bullshit that makes you laugh due to the level of inaccuracy and falseness

2. An adjective used to describe someone who frequently lies and makes false statements to the point it entertains anyone listening.

3. The objective of the board game "Malarky"
Eric: Dude, I fucked that chick all night long.

Gabe: LOL, that's liarious!
Phil: I am so much sexier, smarter and cooler than you.

Peter: OMG, you are one liarious dude.
by quasigenius August 22, 2009
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