Top Definition
verb: when a girl is recieving anal sex, she tells the guy to make sure that before he cums, to pull it out let her give him oral sex until he ejaculates in her mouth.
"Dude, I heard you gave that girl the dirty finno last night."

"Can you get an e coli infection if you do the dirty finno?"
by tarah phinno May 17, 2010

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