Book shelving

When you double stack two penises Oreo style.

Stay away son, them mfs book shelving.

Shelving

When you shit an entire log onto the toilet seat, on purpose.

Bro! I totally just shelved a log on that bitches seat.

Ewww my boyfriend is into shelving!

Dude, I think I’m gonna shelf at that girls party

gut shelving

Placing your fat beer belly on the backside of a desperate stripper in order to perform mediocre coitus.

Guy 1: Man my knees have been really hurting when I do doggy to those slutty strippers.
Guy 2: Brah, you need to be gut shelving those strippers it's done wonders for my knees.