The wenus on your finger (knuckle skin). It doesnt go down if you pull it up. It also apparently looks like a dinosaur.
Your fingus looks like a dinosaur!!
by shgjklasdgh May 10, 2007
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The growth in between a fat mans balls and his bum hole.
1-
Terry: Oh man, that's fuckin sick!
Nathaniel: What?
Joseph: Shit Nat, your sir-fingus is hanging out.
Nathaniel (embarassed): You guys man...

2-
Bob walks out of his front door naked.
Next door neighbour: "Hey Bob, ur sir-fingus is flopping around."
Bob: "yeh, cheers mate"
by Fuckenhowzer May 17, 2007
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A very smart kid
FinGu is a smart nig
by Xd1337 March 10, 2020
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