Top Definition
a sentual expierience in which a gay man pets the lower ''gooch'' below the genetalia of his intimate gay partner. this is commonly known as a after dinner mint. these were both created by tyler andrew clark a famous gay kama sutra specialist. he also created the stinky charles and sunkin row boat see definitions for full results.
1. "hey samuel whats 2nd base for a gay guy"
"silly you know damn well... a little undernut"

2."want an after dinner mint or should we just shove it in"
by Clearance Drinkwater July 03, 2006
2 more definitions
Similar to side boob. This refers to the trace of scrotum visible between a nude male's legs when viewed from behind.
"Have you seen "The Room"? It's got some major Tommy Wiseau undernut!"
by movie_dork May 23, 2009
The area directly below the scrotum.
I don't know why my undernuts is so itchy.
by Dreadlocke May 13, 2006

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