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1.
Used to express acknowledgement of a minor accident, blunder, or mistake.
"Whoospy daisy,I nearly killed myself!"
by Sam the man November 27, 2003
 
2.
Sexual Move: When railing a bitch doggy-style you "accidentally" misfire, drilling the girl right in the ass. When she turns around, you say "whoopsy daisy."
I was pounding that girl hard when I decided to go for the ass. So I gave her the ole' whoopsy daisy.
by T.O. 88 October 23, 2007