The act of women (or men) acting like a slut. Typically used when referring to actions you are intending to do in the future.
I got this awesome slutty outfit for Halloween this year. Think I should wear it?

Slut it up girlfriend!
by Tommy C. Britt October 26, 2007
What one often does after a breakup -- usu. the end of a longterm, monogamous relationship -- which involves promiscuous sex and/or sex play with a variety of partners. Sometimes accompanied by malicious intent.
"It's only been two weeks since I dumped my boyfriend and I've already slutted it up with two other people!"
by Megan Redhead October 27, 2001
A kinkier way to dap someone up. Very subtle but also slutty and kinky at the same time.
by WhyNot92 October 27, 2021
adj: dressed in a slutty manner; for a female, dressed in such a way so as to "show of the goods" in order to attract billy badasses to get pwned by; see also tarted up
"Knowing she would be at the club that night, and yearning for any random billy badass's cack, Candi got slutted up for the night.
by Adolf Oliver Bouchere May 27, 2008
imp: a derivation of Barney Stimpson's "Suit up!" (CBS's How I Met Your Mother); an imperative to put on one's sluttiest finery
"Barney told Robin to "Slut Up!"
by Adolf Oliver Bouchere May 27, 2008
A term used when one is getting ready for a "slutty" party (i.e. Halloween parties, lingerie, etc.). Resembling "suit-up", to "slut-up" is preparing for action. Ideally it is the "outfit" with the least amount of clothing.
Slut-up! We are going to a Halloween party!
by CKJONPLASCENCIA November 3, 2012