Don't let your [meat loaf].
A sexual expression one guy says to another guy or group of guys when he is leaving. (referring to his junk) The response by the other guy is usually something like: Don't let your bag drag. or Don't let your carrot stick
Nate: hey man, im gonna take off.
Stan: Ok. Don't let your meat loaf.
Nate: i'll try. Dont let you carrot stick
Stan: Ok. Don't let your meat loaf.
Nate: i'll try. Dont let you carrot stick