look up any word, like sparkle pony:
 
1.
Unplanned and impulsive removal of all clothing.
Spontinudity was rampant at the frat party last night.
by Sorority Mom July 21, 2009
 
2.
Gettting naked at weird or random times or places
"...and I was watching a disney movie wit my baby cousin and all of a sudden it was like DAMN, spontinudity....Snow Whites a freak, thats all I can say..."
by LilMerm October 31, 2003