crack me up

when someone says something funny and you start laughing uncontrollably you say "YOU CRACK ME UP!"

person 1: he is planning world freckelation!
person 2 who is laughing uncontrollably: dude! u crack me up!

by golden weirdo July 20, 2008

cracking me up

Making me laugh

You are cracking me up!

by bradk October 1, 2013