Day in which every waking minute is spent enjoying coitus. Used most often by desperate couples seeking to have a child.
Jane: I'm ovulating, so I need to take a day off for a Sex Day with John.
John: I'm getting laid consistently for 24 hours.
by Pete Cooter December 14, 2005
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1. The second day of school when you turn everything everyone says into something perverted.
Dude 1: *eats a brownie* god this things hard
Dude 2: HA HA HA HA EWWWWWWW!!!!
Dude 1: ...pervert...*eats brownie*

Dude 1: *walking in the rain* i'm soaking wet...
Dude 2: EWWWWWWWWWWW ^_^ ha ha ha
Dude 1: ...perv...
by Cazzie and Erin August 13, 2005
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No sex day- usually celebrated on the 3rd of october, everybody participating refrains from any sexual activity until midnight 3rd of October
Hey Jenny, you realise its no sex day today right?
by Goggler201926 October 02, 2019
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June 9
The day in which couples (gay or straight) celebrate sex by having sex. The reason National Sex Day is on June 9th is because 6/9 closely resembles the popular sex position 69.
Honey, today is National Sex Day! Let's fuck!!!
by E-Dog1209 June 09, 2015
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On August 21st, we celebrate International Sex Day. This holiday originally thought up by Canadiens got a following after being mentioned on Gossipbees, a Los Angeles based gossip webpage. It basically is a day that encourage people to have sex, any and all kinds of sex, as long as its intercourse. Of course it HAS to be concential.
Its my birthday today!!!

Oh yeah. Why, its August 21, the International Sex Day. Let me give you your holiday present.
by COCKDiesel August 21, 2009
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