funderside

the fat on the underside of someones arm.

"Dude, did you see Katie last night?"
"Yea man!! When we were doing the YMCA last night her funderside almost hit me in the face!!"
"Yea, dude. She got fat."

funderside by fatpeoplesuckalotdoingtheymca October 8, 2009

underside 

same thing as taint, gooch, etc.

it's the patch of skin between the balls and asshole. girls have one as well but it's not as funny.

it was so hot out my underwear was soaking up all the sweat from my underside.

underside by Feve July 25, 2011

Russian Underside 

the russian underside is when your lady gets on top of you upside down and backwards and masturbates you with a 400 pound salmon while you masturbate her with a snow fox.

"Natascha, I think we need to spice up our love life"
"Boris, if you go to the fish store and get some salmon, we can do the Russian Underside and things will be so much hotter!"

Russian Underside by milkmaid604 June 13, 2007

Scratching the underside 

To undertake action that is considered risky and taboo

A man returned from a drunken and chemically facilitated night out on the wrong side of the tracks. Another man, upon seeing our hero's return, quipped: "he's been scratching the underside".

Scratching the underside by Bakelite October 2, 2012

The French Underside Childmaker 

A sexual act in which a male picks a female up, shoves them into a ceiling fan, and proceeds to fuck them, wether if they are dead or not.

I just did The French Underside Childmaker to your mom!

The French Underside Childmaker by SirSnyder February 1, 2020

fundecided 

The act of being in college without declaring a major.

John - "How does ryan manage to party every night and still pass?"
Sam - "He's fundecided"

fundecided by schraf November 16, 2011

undersided voter 

Someone who has zero doubt who they'll vote for, and says "Well, gosh, I can't really decide at this point."

Skewing the polls, giving the country a false image of its future, she characterized herself as an undersided voter.

undersided voter by Monkey's Dad August 24, 2020