Whoopsie Daisies 

An antiquated expression generally meaning "oops" or "whoops". This is used almost exclusively by nerds and gay men, especially when executing a clumsy or cloddish movement such as falling over a chair or slipping on an icy walkway.

While clumsily attempting to ice skate a real tool slips and falls, and when his butt contacts with the ice he yells out "whoopsie daisies!"

Whoopsie Daisies by KImCobain March 3, 2015

whoopsie daisies 

When you are having sexual intercourse with another person then admit to having multiple STDs and shout "whoopsie daisies" and refuse to pull out.

"I have herpies, aids, and genital warts WHOOPSIE DAISIES"

whoopsie daisies by Cannon Joe November 17, 2013