Top Definition
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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