Celebrated on March 6th. All of the following are acceptable practices for slut day:

1. Slutty behavior: make out with a stranger, blow jobs in the bathroom of a bar, one night stand, showing any of the following to large groups: breasts, vagina, penis, balls.
2. Thanking your favorite slut for her contribution to this holiday (specifically involving you).
3. Going to Las Vegas
Today is March 6th! Happy Slut Day!

Can I borrow that mini skirt and tube top for Slut Day next week?
by jmarie26 March 06, 2010
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October 31st at WHS, also know as halloween. All of the popular girls (mostly cheerleaders) use this day as an excuse to dress up in very slutty costumes.

Examples From Halloween '04: naughty nurses, angels, devils, genies, and costumes invovling fish net stockings
Rob: HOLY SHIT! Did you see the naughty nurses?
Matt: OH Yea! I would tap their asses any day.
Rob: I'm gonna go look again.
by Mister D November 06, 2004
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First day of each year where the temperature rises above 70F in regions of the US where temperatures in the winter months average at 30F and below. This day is characterized by excessive sunshine and general highs from a sense of spring in the air which prompts white people to wear revealing summer outfits that show off the pale, white skin they have been hiding all winter under peacoats and scarves.
"Man! Guys in tank tops on the quad? Girls with their short skirts exposing their painfully white legs? It's only March 21st! Is it White Slut Day already?"
by ITobz February 27, 2012
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January 26th is international slut day. Do what ever you want today that would normally get you called a slut
Person 1: “hey I think I love you, go out with my”
Person 2: “hmmm idk cause international slut day is next week sooooooo…”
by Slutdaygirl January 25, 2021
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Halloween. That blessed day that occurs once a year when every young woman knows she can get away with dressing just as sluttily as she wants. Characterized by drunken parties, slutty costumes, fishnet pantyhose and lots of tipsy girls lurching around in hoochie heels they obviously don't know how to walk in. Thank you, American costume industry!
I fucking love Dress Like A Slut Day! You get candy and dick all at the same time!

Dress Like a Slut Day is awesome! You hang out at the bars with all the drunk Nightshift Nurses, Slutty Schoolgirls, French Maids, and Naughty Cops tottering around in their slutlettos. Then you pick one up and bang her!

Dress Like A Slut Day lets me dress the way I wish I could every day...
by qizznipper October 20, 2013
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synonyms: Halloween, All Hallow's Eve. An American holiday celebrated on October 31 for which women, particularly of the college-going age, dress like sluts by wearing themed costumes.
See "slutty Halloween costume formula."
My girlfriend bought a great French maid costume for National Dress Like a Slut Day; mini-skirt, fuck-me pumps, and fishnet stockings.
by Ronny teh Pir8 October 11, 2008
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that special day of the year when girls (or usually just one girl and her friend) as an inside joke, dress as slutty as possible to make fun of all of those other bitches who do it daily, thinking they look so hot. *also to see how many guys get "excited" if you know what i mean ;*
I'm wearing my mini skirt and thong on National Dress Like a Slut Day.
by heeeellyeah. December 14, 2009
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