look up any word, like bukkake:
 
2.
One who laughs in such a cute way and is not able to stop. sometimes one begins to cry because they are so entertained with what is going on.

A substitute teacher in high school might call a young girl who is flirting with her crush a giggle box and say she should be quiet.
Rachel: Have you been around Kayleen today?
Melissa: No, why?
Rachel: Good. Stay away, she's such a giggle box today. I think it's because she's been around Logan.
by quicky. February 09, 2009
 
1.
def: someone who laughs alot naturally and is fun to hang with
background: ricky ramos
you're my little gigglebox!
by elyssa July 13, 2004
 
3.
another name for smokin pot, since you can laugh insanely at pretty much anything and everything.
My friends and I hit up the giggle box tonite, man was I stoned.
by hkpp13 March 06, 2009