A philosophy that proposes that a person should live for the moment, because when you die, you’re screwed. A big proponent of this was Sartre, Kama Sartre.
When a Danish philosopher has sexistentialism with you, you’ll be Soren the morning.
by Jarod Kintz October 9, 2007
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Moment where you do not know anything about your gender or sexuality.
"I'm going through a sexistential crisis right now can you please advise me?"
by sexistentialcrisisdunderhead December 22, 2018
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Post-hook up worry about things being weird because you hooked up with that person. Feeling bad because you had sex that might not have been a good idea.
"I just did one of my ex's friends and am now suffering from sexistential angst."

"I've got some pretty bad sexistential angst, wondering how long I should wait before I call this dude."
by GullibleZine March 6, 2007
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when one pines after another and after much effort finally has intercourse, only to be dissapointed by the reality in comparision to the fantasy.
dude, i have been trying to nail that girl for so long, and finally we hit it last night, and man total sexistential dissapointment.
by dave young December 1, 2005
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