1 definition by Crispio di Moistici

When somebody makes a joke in front of a group of people and it falls flat; leaving them babbling like an idiot to explain themselves. Legend is, if you do it badly enough, Mothman himself will show up and beat the shit out of you.
Bro, Evan just mothmaned so hard.

Don't say that. That's a mothman.
by Crispio di Moistici December 2, 2016
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