underdid 

the same as understand

I hope you underdid what I'm saying before I kick ya ass one mo ginn

underdid by blackie March 9, 2004

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

Underidoderidoderiododeridoo 

Famous quote from Winston Churchill.

Me: Bro the quote "Underidoderidoderiododeridoo." speaks to me every time.
Random Person: What

Underidoderidoderiododeridoo by Comidiyan August 6, 2021

Underduded 

When a chick steadily dates a dude that is not as attractive as she is.

Dude, what is Lisa doing with that dork? She is so underduded.

Underduded by 51Westside June 23, 2011

Underdig 

To "Understand",is to Dig(like it or not) what a person is saying.
To "underdig" is a total comprehension of what someone is sayin'.

That's some California Bay Area Lingo...
brought to you by The E Forty (E40) himself... get the book learn the lesson..All others are posers. please believe

Make sure you Underdig what I'm saying, before I have to put my hands on you.

Underdig by Trust me January 2, 2006

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

underdig 

(n.) understand; a combination of the terms "do you understand?" and "can you dig it?"

-Used widespread throughout urban neighborhoods. Although the origins are unknown, Def Jam/ Roc-A-Fella/ Thugged Out Militainment recording artist N.O.R.E. aka Noreaga is credited for makeing the term mainstream.

I'ma be back later for my money; Underdig?

underdig by Shizz August 9, 2004