James Borlase's definitions
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
Get the Rack Offmug.