Top Definition
A friggin moron. A nicer way of saying, fucking moron. Comes from Freaks and Geeks, courtesy of Daniel Desario.
"Dude, don't be such a friggin mo."

Tom- Hey should I ask out Susan? She was hitting on me today.
Al- Dude, don't be such a friggin mo, she sleeps around, if you do wrap that shit twice!
by The King of Friggin Mo's March 13, 2009
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