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1.
A synonym for words relating to cool such as tight, chill, fresh, sweet, shibby, awesome, stupid, dope, off the hook, hot, gangsta, beastly, etc.
Usually used to describe a very cool thing.
Dude that party last night was brash!

What did you do last night?
Did my girlfriend.
Thats brash, way to be dude.
by Fantasia DeepJugs February 29, 2008
 
2.
Brash: a sexual act involving five girls, one boy and a pineapple.
Keen for a brashing.
Brash me.
by jlfjasjfoienwviauehgjkshdfkd June 08, 2011
 
3.
When a person or animal thinks of themselves as high and mighty amongst a crowd of "actual" high and mighty people. Often referred to as a Severin.
Wow, That look at that Severin, I swear he just doesn't know when to quit. Silly Brash people
by Pppseudonym May 03, 2011
 
4.
cool. awesome. you know, the usual.
cool kid: "youre pretty brash."
other cool kid: "thanks."

l00zurr kid: "that scene kids pretty brash."
cool kid: go kill yourself.
by Timothy and Maxine June 20, 2007
 
5.
ADJECTIVE--

-rude and nasty to people
-ugly

NOUN--

weave
-the highest level of ratchet
-a woman who acts disgustingly trashy and ghetto
Ex.1 noun: boy: you like her?

boy2: no nigguh she got the most ratchet-ass brash i have ever seen.

Ex.2 adjective:
ooh im finna slap her in her brash ass face, she nasty.
by Like A Sir October 19, 2013
 
6.
shortened form of butt rash
Her brash from the poison ivy was causing her discomfort during sleep.
by nameless2 July 12, 2006
 
7.
To kiss with tongues

Commonly used when said kiss means nothing such as at a club, party or is very impulsive
Friend - 'Did you have a good night last night?'
Guy - 'Oh yeah, I brashed loads of birds'

Friend - 'What happened with you and Natalie?'
Guy - 'I don't know, man. She looked so hot, I just went up and brashed her!'
by The only chosen one May 26, 2012