under ball 

The portion of the scrotum near the ass-ball-connection, most commonly used for hand warmth.

Man, today it was so cold I had to use my under ball to warm up my fingers.

under ball by Cee Tee December 4, 2010

undertall 

A condition caused by the height and weight ratio not working out just right.

She's not overweight, she's undertall.

undertall by cowboy_up September 4, 2009

Soft White Underbelly 

The bus terminal at Union Station in Denver, Colorado.

He took the 15 to Soft White Underbelly to pick up some clr and blues.

Soft White Underbelly by spigotthebear February 17, 2023

Underbell 

The underside of one's penis, usually towards the end.

Ouch my underbell!

Underbell by Tomujs August 7, 2012

underbelly cleavage 

(noun): A rather large portion of fat extruding from a person's (man or woman) shirt, so much the belly is sticking out of the shirt he/she is wearing. The inverse of cleavage.

Eww she is showing some serious underbelly cleavage. Turn away!

underbelly cleavage by UNknownINformant May 22, 2009

underballs 

The area between the base of the scrotum and the anus. (informal) taint. Coined as a play on the compound word underarm.

That girl has the face of Mama Cass, the body of Mama Cass, and the hair of my underballs. I'll pass.

underballs by Throbbing Monster February 10, 2009

underbelly 

bloody awful cack - the lowest of the low.

have you ever been to austria? - its complete underbelly.

that pie was massively underbelly, - i feel ill.

underbelly by merk hunter May 6, 2008