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1.
A chemical reaction
Yes. I am happy. My nipples are bursting with excitment.
by Warg August 23, 2003
 
2.
A feeling of contentment and peace, like you don't need anything else.
Dude 1: If you could have anything right now, what would you have?
Dude 2: Nothing, man. I'm happy as is.
by M. M. S. January 05, 2006
 
3.
what everyone wants to be without the aid of mind-altering substances
if you need drugs to make you feeel happy, then you're not really happy
by frsky August 01, 2007
 
4.
How you make me feel.
Words cannot describe how happy you make me feel.
by Karma19 September 24, 2009
 
5.
1. A feeling of joy and/or contentment.

2. The name of a Butterfree owned my Ritchie in the Pokemon series.
"I feel happy today."

"Use sleep powder, Happy!"
by ProudGinger March 11, 2009
 
6.
Stereotypical name for a Korean dog. Pretty much the Korean version of "Spot", or "Rover".
Sung-bin's dog's name is Happy. No, he's not gonna eat him, you racist fuck.
by wcgold May 14, 2005
 
7.
Happy is a song that was written and produced by the very talented Pharrell Williams. It is truly a song that will make you feel alive and in a very special warm and fuzzy space. It is an elixir for all that ails you.
If you listen to Happy while traveling to work, you will be in a very positive frame of mind all day long.
by PY Love and Peace March 20, 2014