look up any word, like b4nny:
 
3.
oxymoron- He is far from happy and feels no one else should be either. Also, never communicates with anyone what he's unhappy about, leaving all bewildered as to "what he's on about"

Speculations arise as to the general and specific sexual satisfaction of Mr. Happy, but again, due to poor communication, who knows.
"Oh look, its Mr. Happy again." "What a nutbar"
by kazooie December 28, 2012
 
1.
Yet another term for dick (Penis)
A few moments after Lorena Bobbit picked up a knife, her husband soon noticed that Mr. Happy wasn't there any more.
by PierreII January 13, 2009
 
2.
also spelt as Mr. Happy
other than the charachter of happiness in the illustrated children's book series called Mr Happy.
Mr Happy means penis

As I saw Olga Kurylenko getting a bondage in the movie The Hitman I felt the urge to shake hands with Mr Happy.
by Total Issues February 01, 2008
 
4.
An erect, happy penis belonging to only one man in the whole world. Perfect partner for Mrs. Cosy, in which he fits snuggly and (as the name would suggest) cosily.
Ryan zeelie introduced Mr. Happy to mrs cosy and this great union resulted in great pleasure.
by hippykid July 20, 2011
 
5.
A Figure of Speech; when the "bitch" of your group of friends decides to do something bold and unexpected of them, you can simply remind them that Mr. Happy won't be pleased.

Mr. Happy can be any form of a terrifying creature, but in this case, he is a serpent lodged deep inside a seemingly nice womans vagina. When that woman becomes enraged or disgruntled, she sends Mr. Happy to do her dirty work.

Forms of attack include severe pestering, extreme discomfort, headaches, the ability to put one in a bad mood, extreme hair growth on thighs, shoulders, and face, and on occasion; death.
"I'm going to stay up until 6 p.m. today!"
--"Peter I wouldn't want to make Mr. Happy upset."
by Bukk Lao January 12, 2011
 
6.
A penis the morning after having sexual intercourse.
I had sex last night. Mr. Happy is cool.
by ekks September 22, 2010