A finger that kind of looks like a penis.
Marina, stop sucking on your fingerpenis!
a short and narrow/thin penis
that has similar dimensions to a finger.
He had a finger penis, so I had to rely on motion in the ocean to get off.
A penis that is lacking in girth relative to its overall length, leading to said penis resembling a finger. A true finger penis will be uncircumcised- the foreskin completes the finger resemblance. A circumcised penis will carry the moniker of a band-aided finger penis.
"Do you have condoms for people with long and skinny penises?"
"You mean fingerpenis condoms?"
A term used by elite warriors of the east. The great warrior "justanini" developed this term as a way to communicate true feelings for nubs. No nub shall use the great word "fingerpenis". He will endure many night of nubious pain a anguish.
Chad you fucking noob, GTFO or ill get you with my fingerpenis