2 definition by timpanum

Top Definition
An acronym signifying one's Most Masturbate-able Facebook Friend
She's got some nice bikini shots on Facebook now, she's definitely my new MMFBF.
by timpanum December 20, 2014

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A rusty trombone wherein the recipient of analingus and a reacharound concludes by urinating rather than ejaculating.
James drank a large quantity of coffee early in the morning, so his anticipated rusty trombone instead became a shiny trombone.
by timpanum September 20, 2014

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