Rash the denom

Hip Slang used by math teachers for the algebraic property "rationalizing the denominator"

Dont worry Brittany, you dont have to extend any lines. Just Rash the Denom

by Crosswell Student March 2, 2010

Johnny Rash

When you’re on the beach too long in wet bathing suit that rubs against your skin and causes you to develop a rash. Native to the southern jersey shore. Vive la resistance.

“Damn I got Johnny Rash (aKa JR) again from getting drunk with the circ on the beach and sitting in my wet bathing suit”

by Trent R. Glass July 17, 2021

Ham Rash

When your having sex doggy style, and the rubbing of sweaty hairy legs creates a rash.

He was cute, but he gave her ham rash.

by Mcwhit April 23, 2021

guido rash

A skin irritation received after one brushes against a sweaty over-cologned guido. Worst case occurrence during an outdoor party where the shirt is also removed and the stubbly chest is exposed.

Lauren was inflicted with guido rash after walking across the dance floor next to the hotel pool.

by emknott1 December 11, 2011

Pube rash

When grinding so hard during sex that one or both partners get a red, inflamed and irritable rash from the other person's pubes. This is especially painful if one of the partners recently shaved. Pube rash was originally coined by Eltrombopag in early 2011.

Grogan: Hondah rode me so hard last night and now I have this rash...
Dr. Danny: Yeah dude, that's pube rash...Next time just give her an eye closer

Gavon mounted Gason dry and raw last night and now Gason has a savage pube rash and needed to be treated at the local clinic.

by Owl Manning March 9, 2011

rash stash

This is a crust around the mustache / beard area caused by dried on snatch (aka vagina) secretions.

Our co-worker came to work again today with a bad case of rash stash.

by Craig Werner April 15, 2008

gentleman's rash

The painful areas of skin at the top of your inner leg, arse cheeks and scrotum which develop after working a busy shift in a warm environment: chefs arse

Diner: Excuse me waiter are you having trouble walking?
Waiter: Piss off, I've done a 14 hour shift and my gentleman's rash is killing me!

by Rellie August 3, 2007