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1.
A phrase used by people (mostly male) after fingering a female, due to the "pleasant" oder the vagina leaves on the fingers.

However, most people who use this joke haven't actually gotten any, and are saying it to be funny or insulting, or are bragging about it. Best when used towards friends about people they're close to.
Jimmy: "Hey Timmy, you know your sister, Bella?"
Timmy: "Of course, what about her?"
Jimmy: " Smell my fingers ;) "

Ben: "So me and that hot co-worker Jenna went out to lunch somewhere private"
Mickey: "So?"
Ben: " Smell My Fingers "

Mickey: "Score!"
by TrainedSavior June 27, 2011
59 20
 
2.
A phrase used when one's finger has recently emerged from their asshole, and the speaker wishes the listener to experience the smell of the speaker's own ass, i.e. that of poo. Used once by Chris Griffin from Family Guy, and parodied by the title of an online game, "Spell My Finger".
Person 1: Hey, man, smell my finger.
Person 2: I know where you're going with this. I don't appreciate that you'd try to fuck me over in this way.
Person 1: Dude, it's not like that. I was just touching some Smencils I have in my pocket.
Person 2: Oh, I've always wanted to know what those smell like. I swear to Christ, it'll be the death of me when I figure out how to attach a smell to a pencil. All right, then... Aaaaagghh! Asshole!
by Tez, a man February 04, 2010
38 22