A "rack" was a slang term for a motor-bike for older Australians. So, to go get "on-yer-bike" and go away upon a command you would be "racking off". To rack off is less rude, but alliterative, for another popular expression.
Hello mate, may i come to your party and dance the "Maroubra Stomp?"
No, mate, you may not. Rack Off.
No, mate, you may not. Rack Off.
by James Borlase October 24, 2005

In the military the rack is your bunk. To rack out or hit the rack is to go to bed for the purpose of sleeping. If you find it difficult to get out of bed through fatigue, laziness, illness, hangover, depression, or any of a number of other reasons, then the "rack Monster" has ahold of you.
"I know we were all going to see Tina the Cat Woman today, but the Rack Monster had ahold of me and wouldn't let go."
by Big Tim 1949 May 20, 2009

when a chick has a large rack, but she also has a fat gut and/or ass. the fatness is the taxation on the good rack.
by st3v3 November 2, 2006

by 1longdickdaddyfromcincinatti May 17, 2015

Letting a homeless man use your telephone to make an important call and he accidentally calls one of your friends.
Susie: "Was that a butt dial?"
You: "No, I'm sorry about that. You know Jimmie Jamz, the homeless guy who always hangs out on 12th and Walnut? Well, I let him use my phone and he called you. It was a Rack Dial."
You: "No, I'm sorry about that. You know Jimmie Jamz, the homeless guy who always hangs out on 12th and Walnut? Well, I let him use my phone and he called you. It was a Rack Dial."
by James Hides August 9, 2012

Hey did you get a chance to check out the aftermarket rack on that chick? Must've cost a stack of dead presidents.
by Blankford1 December 7, 2013

by Andrew Barcetony June 28, 2017
