push-up Undies 

Extremely tight pair of girl's underwear that wraps around the girl's buttocks giving a "secure lift" & leaving a "V" lining in the center of the girl's buttocks while wearing "tight" pants.

Girl's Butt stands out when she wear 'em Push-up Undies

push-up Undies by New User November 27, 2013

headbutting me undies 

Australian term. To be on the point of shitting yourself or needing a shit very badly.

Nick: "I nearly shit myself yesterday....it was headbutting me undies"

headbutting me undies by fuelline February 14, 2018

Wouldn't that just rip ya undies! 

Kiwi (New Zealand) and Aussie (Australian) slang expressing frustration in an amusing way - as in for something that's really close but isn't quite there yet and would really annoy you because of it (is often used in Murphy's Law situations)

Sally: I only needed 1 more white shirt, but they've all sold out in my size!
Mary: Oh, "Wouldn't that just rip ya undies!"
Sally: Haha yeah - couldn't find any of them either!

Bob: I only needed 2% more to take the village over!
John: Oh! Wouldn't that just rip ya undies!
Bob: lol totally

Wouldn't that just rip ya undies! by AhkNemet1 August 26, 2009

poopy undies 

the definition of a nasty ass shat.

i have poopy undies.

poopy undies by jadesmith101 January 4, 2009

Tight undies 

It is the joy of having a bonerific time in your pants. When your snake gets larger due to interactions of various human kinds, it can lead to the situation of 'Tight undies'.

An example of this:
Boy 1: Oh hey theres that chic I want to ask out, should I do it?
Boy 2: Yeah go for it dude
*Boy 1 walks over*
Boy 1: Hey babesickle, wanna go out this weekend?
Girl: Yeah sure, but what is that bulging in your pants, looks like your undies are getting a bit tighter
Boy 1: Well you see, old beatrice got a bit excited downstairs when I saw you, so yeah... Bloody tight undies

Tight undies by Max Barnes September 7, 2013

Suffer in your Undies 

Used when somebody is whinging about something and you dont care about it and just want to shut them up

Nick: Emily, my pen isnt working!
Emily: Oh Suffer in your Undies

Suffer in your Undies by Charly09 December 20, 2008

creamed my undies 

When you get a bit excited and then cream your undies.

Dude! that chick was so hot i creamed my undies just looking at her.

creamed my undies by 1outs September 14, 2014