Adj A man who is obviously gay
"i thought Mark was a little weird, he was seen at the club wearing a pink boa. What a whoopsie!"
A flaccid penile ejaculation, inducing a violent recoil.
John had an embarrassing whoopsie during a routine physical with Dr. West, resulting in a big soft white mess.
Lavatorial accident, a la Frank Spencer.
Oo Betty, the cat's done a whoopsie in my beret!
to get a boner at a bad time
"Dude, RIGHT before I had to give my speech to the class, I got a whoopsie!"
Getting hurt in the private area. Originally came from the video game Mortal Kombat.
Brittney kicks Evan in the balls. Evan says "Whoopsie!"