Top Definition
A joke that is funny as well as gnarly to the extent of being compared to a narwhal: a half whale, half unicorn creature.

Also spelled Narlol.
"Bro, that joke was totally narlol."

Guy 1: Man, I totally got that slampiece to make me a sandwich.
Guy 2: Gnarlol.
by delayd October 26, 2010

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