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The act of fighting between two males with their penises (Duncan) as a sword.
To win a Duncan Battle you need to take down the opponent by getting your Duncan up the opponents mouth.
Bro 1: “hey bro wanna duncan battle later?”
Bro 2: “hell yeah, I’ve been practicing all week.”
by Nigcan June 20, 2019
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Apr 21 Word of the Day
I've been jabbed
by Francesco II March 20, 2021
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