Bum Plucky 

Having someone put cereal in your ass then picking it out.

Micah: “Did you hear I gave a Bum Plucky to a girl last night!” David: “Yo!! that’s sick bro!”

Bum Plucky by Dried craison July 13, 2022

bum pluck 

An estimate without any factual basis, a guess. Originated in the Australian military in place of "wild ass guess" and di you ..." pull that out of your ass?"

It was a pure bum pluck!
Take a bum pluck mate.

bum pluck by DAC9DAJC January 15, 2018