An Unwanted Erection, purely for the annoyance and anguish of the embarrassed owner.

Commonly shortened to "spont","sponty" or "sponer" (spow-nerr)
"Goeffrey, it has come to my attention that throughout this entire car journey you have been wielding a Spont-On worthy of documentation"

"Oh Isiah, what an embarrassment. I do implore you forgive me my good friend"

"You are forgiven, now enjoy it while it lasts, my friend"
by Randomflapjack March 4, 2008
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A tribal dance involving twerking and pterodactyl screams.

Often a mating ritual seen in clubs
Ew gross man, what are you doing?!
Chill bro, I'm sponting for that chick over there.
by Steve Irwin the third June 6, 2014
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I was drivin down the road and all of a sudden I got a spont.
by Ben Jackson August 6, 2006
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1. To do something spontaneously.
2. (On the) To do something without planning at that moment.
We decided to go get beer and drink all day, on the spont tip.
by Roberto Evangelista March 14, 2005
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