humor slut 

girl who laughs at almost anything, usually an easy target for drunk dudes looking for an easy lay

Jack's after that humor slut Jill, it'll only take him about 20 minutes to get laid.

humor slut by The Morning Star April 9, 2006

Humor slut 

Humor slut: Defined as any given individual, who will do anything, and go to any length to get a laugh out of a given situation, purely to be the center of attention and stroke their own ego.

Person 1:".... and thats what SHE SAID!!"
Person 2:"God... you're such a humor slut"

Humor slut by JamminLemon June 7, 2011