"johnny just got caught choking his chicken in the restroom"
"gee whiz that kids a MLFU"
by ChimoStine May 3, 2010
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Major league fuck up

The act of fucking up big time, similar to a fucky wucky.
Guy 1: If you don't hear from me by tomorrow, I'm dead.

Guy 2: what did you do?

Guy 1: A MLFU.
by GameMech May 26, 2020
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Mlfu means much love for u
Thanks for wishing me a happy birthday mlfu 😘
by Olivia hamster November 6, 2019
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