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.
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!
I crack myself up
A phrase spoken by Humpty Dumpty as he commits seppuku
Humpty Dumpty: "I crack myself up"
*dies*
*dies*