Undies 

Underpants (usually of a female). Originally an Australian slang term, Americans are finally picking it up due to the word ‘panties’ being creepy AF.

“My undies are riding up my bum.”

Undies by HeeGee January 14, 2021

undies 

The undercover law enforcement

Guy 1: who's that creeping
Guy 2: its the undies bro hide the loud

undies by Youngtadoe May 30, 2016

undies 

The undergarments warn by both males and females.

I want you to do something for me..take of your undies and send them to me by express mail so I can get a sniff of what you smell like.

undies by basketcase_101 June 14, 2003

undies 

oh undies if they get too dirty flip them inside out and they are good for another week!!!

dudei've worn my undies for two weeks straight ithink i better change them!!

undies by jojo g. October 8, 2006

undies 

underwear, especially women's underware

Her undies were clearly stained.

undies by Light Joker August 18, 2005

Undies 

High school underclassmen (especially freshmen and sophomores).

I got shoved by an undie in the hallway today so I schooled 'im!

The undies in my photography class thought I was a freshman -_-

Undies by Ello the band geek December 18, 2009

undies 

undies = not only underwear, but slips you wear under specifically under bridesmaid dresses

wow, thanks sarah for giving me the advice on the undies for the bridesmaid dresses. your a lifesaver.

undies by dersamuelmoore December 25, 2009