when two friends place their asses against one another then each slide slightly to the side, placing a cheek in each others crack. then both parties fart to "close" the buckle.
i barely got my pants off when my girl crept up behind and fart buckled me.
A bucket that rebelious children continuously fart in and close the lid to trap the stink inside. Then they hope their parents will open this bucket and get a waft of child fart.
Dude, I can't wait for my bitch Mom to open my fart bucket. It's got three years of my stinkiest farts waiting for her.