Over the back rack shack 

Brassiere. Other slangs are, but not limited to; "Over the shoulder boulder holder" and "Across the chest breast rest".

I had to ho buy an over the back rack shack for my wife the other day.

Over the back rack shack by Toblucz May 2, 2014

rack the shotgun 

The act of pulling the foreskin back exposing the head of the penis.

Yo Timmy. I can't find dickhead.

Yo john you gotta rack the shotgun.

Oh there it is. Thanks

rack the shotgun by WayneTrain82 December 8, 2017

curls in the squat rack 

When someone of inferior intelligence trains biceps where legs should be trained

That guys doing curls in the squat rack, yep he's a cunt

curls in the squat rack by Jining November 18, 2013

curls in the squat rack 

The embarrassing and nubish act of doing biceps curls, while standing in a squat rack. This is pure whitebread.

The squat rack is the only place in the gym one can specifically do squats, as the rack serves as the spot / safety.
However standing bicep curls can be done practically anywhere. Thus to do curls in the squat rack not only reveals one's own know-nothing idiocy, it takes up a station that could properly be used by a legit gym goer.

The sort of thing you'd see at Planet Fitness or your average community rec center. Done by people who get their training advice from Dr Oz.

I was going to break my PR in front skwats today, but that scrawny noob over there is hogging the equipment and doing curls in the squat rack!

curls in the squat rack by Too Many Drones May 6, 2020

The Bike Racks 

A benign threat used to end an adolescent style argument. Often followed by a random future time.

Friend 1: "Princess Leia in her slave outfit is much hotter than Laura Croft!"

Friend 2: "No way!"

Friend 1: "That's it. The bike racks, 3 o'clock!"

The Bike Racks by ar42dent June 18, 2010