Top Definition
One who excels at being a killjoy.
A: Wanna hit off my joint?
B: That stuff is bad for you and is illegal... You're just enabling criminals and hurting yourself. Now I have to call the police.
A: You're a master joy assassin, you know that?

A: Ain't life grand?
B: Sure... 'Till you get old, see your family and friends die, your own health fails and it's all over. We leave this world alone.
A: Joy Assassin!

A: Are we having fun yet?
B: When I was seven years old, my priest touched me.
A: Joy Assassin!

A: Look at the cute puppy in the window!
B: Dogs are predators. Given the chance, they would eat those bunnies over there. Is that cute?
A: Joy Assassin!
by youdbesolucktoknowme October 07, 2009

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt