funny fuse 

something everyone has, if you see something too funny your funny fuse will blow and then you can't laugh at anything

Cartman saw the people with asses for heads and he couldn't laugh anymore because he blew a funny fuse.

funny fuse by J-Smoove May 5, 2006

blowing a funny fuse 

Seeing or hearing something so funny that you are unable to laugh for an extended period of time.

Seeing my bosses myspace page with a tranny as his top three friends made me laugh so damn hard that i ended up blowing a funny fuse and didn't laugh for days.

blowing a funny fuse by omfgtsffsmbmphataht3fhwariivt January 2, 2012