Top definition
1. short for beastly mother f*cker
2. someone who is great at being scary
3. somebody that is exceptionally good at something
also spelt beastly-mo
Carlos: "the testicle-monster from Half-Life is one beastlymo"
by RyanJ. June 12, 2007
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Sep 8 Word of the Day
A casual invitation / threat used by an individual that is not afraid of fucking someone up.
PAUL: I'm going to beat your ass.

JACK: Fuck around and find out, fool!
by NX STARCHILD October 16, 2020
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