Definitions by LBK:)

Crackin myself up 

Means when, you say a joke so funny that even you have to laugh, even if you are the only one. Though it's kinda lame laughing with yourself, but, you just cant help yourself :)

haha, knock knock, whos there? boo..boo who?
ohh dont cry its only a joke...HAHAHA

ohh i love crackin myself up

Crackin myself up by LBK:) June 24, 2009