Top definition
Cuck Fu is what happens when two dudes feel obligated to engage in physical combat over a woman, usually in a sexual context.
Person A: Hey, did you hear Tyler and Chad are fighting over Becky again?

Person B: Yeah, it went down the other night. It's shaping up to be the Cuck Fu title fight of the century.
by notreason December 14, 2017
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2
Noun. The art of unnecessarily defending ones masculinity.
"Johnny's a cuck fu master."
"Why's that?"

"He has so come up with an excuse to say he enjoys girly drinks."
by Hazemaster247 June 19, 2017
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