You didn't get it right.
It's "Shit the bed" or "Fudge your undies."
By the way.... you've reaaaaaaaaaaaaaally fudged your undies now!
ETA: "She works haaaaaaard for the funny
(hard, hard, hard for the funny) so haaaaaaaaaaaaaaaard for it honey
(hard, hard, hard for it honey) she works HARD for the funny so you better treat her right!
(so right!)"