bumstuffing 

(n) The act of penetrating one's pooper with an object of a phallic nature (e.g. fingers, cucumbers, johnsons) for the purposes of sexual gratification, regardless of the gender or sexual orientation of the participant(s).

I was going to go the picture show last night until Bertha suggested we go back to her trailer for a spirited bout of bumstuffing.

bumstuffing by wethead May 22, 2006

Bullstuffing 

A less derrogatory way of saying "Bullshit"

"Man why you bullstuffin?"

Bullstuffing by Kamikaze April 25, 2004

bumsnuffing 

Putting a tobacco product in your ass to get a nicotine fix.

Phil can't afford rolling papers, so he's been bumsnuffing cigarette butts all day.

bumsnuffing by anon00999 February 5, 2018