underlayment 

It's a material that is applied under another material for its proper application.

- Ah, dude, your underlayment is thick
-Um, yah, it's cork.
-Cool

underlayment by Mistafil July 1, 2017

Undergarment Overflow 

When large amounts of ones underwear is visibly sticking out of their pants.

Girl: I see your boxers...something I shouldn't see
Guy: Sorry, that was undergarment overflow

Undergarment Overflow by larlarlarlarlar June 20, 2011

undergarment hair 

My wife found a pube in her take away dinner and my daughter asked what a pube was so I said it was an undergarment hair so as not to embarrass.

"Honey, there's an undergarment hair in my dinner, hopefully it's one of yours"

undergarment hair by The Broon One. December 30, 2020

selective undergarment bunching 

Getting ones knickers in a twist for reasons that are not consistent over time. This applies especially to politicians engaged in spin control and selective outrage over the actions of others.

Jon Stewart used my new favorite phrase, selective undergarment bunching or SUB, to describe the reaction of some politcos on last night's show.

selective undergarment bunching by Kelly-TBCRI January 28, 2014

undergarment 

what you wear under your purple pants and jacket.

I removed her undergarments with much force and ripped them and she fell over and I landed on top and we started watching Jay Leno on T.V.

undergarment by David Lewis December 29, 2003

Undeployment 

When you were once deployed but are currently no longer

When you are no long employed it is called unemployment, when you are no longer deployed it is called undeployment.

Undeployment by Maddyhalley March 22, 2019