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2.
-adjective, meaning:
Overly happy and/or cheerful

Taken from Ren & Stimpy's Happy happy joy joy song. Usually used by people who aren't that happy themselves.
- *upon hearing a very cheerful song*
That song sure is happy-happy-joy-joy...

or; Wow, now that is one happy-happy-joy-joy song...
by ShadeOfLight December 18, 2007
 
1.
From the hilarious tv cartoon Ren & Stimpy, happy happy joy joy is defined as when the world expects you to put on this happy and joyful face when what you really want to do is shriek at the top of your lungs and rip your hair out in anger/frustration/misery. To make everyone happy though, you put on this mask of happy happy joy joy while singing a silly song.
Just as you were ready to leave work for the day, the boss tells you he wants you to work both Saturday and Sunday on the new project. You're on salary and so will get no more $$ for sacrificing your weekend. However, the boss is considering you for that vacant position where you'd have your own office with a window, so you happy happy joy joy and say, "Sure thing, boss!" with a big toothy grin on your face.
by MsLi December 25, 2005
 
3.
Song by Stinky Whizzleteats, in the Ren and Stimpy episope with the Happy Helmet. Also the mating call of the crocostimpy. See: ren and stimpy
"I TOLD YOU I'D SHOOT! BUT YOU DIDN'T BELEIVE ME! WHY DIDN'T YOU BELIEVE ME! Happy, happy, joy, joy, happy, happy, joy, joy...."
by no-one of consequence November 13, 2003