crack myself up

to laugh hysterically at your own jokes, whether or not anyone else laughs at them.

And then the eagle says, "That's not MY nest!"...sigh. I crack myself up.

by Jordija March 25, 2004

I crack myself up

Regardless of actually being funny or not, a phrase said by someone who finds themselves hilarious, regardless of what anyone else may think.

I love telling Dad jokes, I crack myself up!

by GlazeHer November 3, 2016

I crack myself up

A phrase spoken by Humpty Dumpty as he commits seppuku

Humpty Dumpty: "I crack myself up"
*dies*

by Buttcrackheads June 13, 2022