undersocks 

A pair of socks worn underneath an outer pair for the purpose of soaking up excess perspiration or filling oversized shoes.

That boy in gym class with the missing chromosome has one foot bigger than the other. He should wear undersocks to even things out.

undersocks by Syzdek May 19, 2009

undercock

The male genitalia being viewed from an upward looking angle. Similar to the female version of underboob but with a wiener instead. Also referred to as Australian dick.

I knew I was going to have a rough day when I woke up to my roommate giving me some undercock.

Your mom seemed pretty interested in me so I gave her a little Australian dick.

undercock by nubforce November 26, 2010

undercock

A man who has smaller penis compare to his male friends'.

Tom: My gf thinks I have a big cock but she doesnt know that I am an undercock compare to what my friends are packing
A guy in the forum: Dude you sound so gay!
Tom: No I have seen them naked at the gym and besides I am only 5" long
A guy in the forum: lol you are an undercock indeed!

undercock by jimissobored July 27, 2014

Undersack

The underside of a man's ball sack.

Her tongue gently caressed his undersack as it moved back towards his taint.

Undersack by JizzlePizzizle August 30, 2010

undersuck 

“when someone undersucks you it means they overcompensate your abilities”-Ethan Offing

He undersucked me

undersuck by EvoCheetah December 11, 2021

Undersack

The male version of cleavage.

Don't show so much Undersack, you'll be called a slut

Undersack by Picklei Volcof March 30, 2017

Undercock

The act of insulting or undermining someone against their judgment and knowledge, resulting in an insult of their manhood, usually making them angry.

John: "Yeah I made the final score in that pickup game, it was pretty impressive if you ask me."

Mike: "Funny, because from what i remember you got teabagged pretty hard and fumbled the ball a bit before making the shot."

John: "Don't undercock me Mike let me have my moment!"

Undercock by bodacious davis January 23, 2011