Clenching and unclenching your buttcheeks as if there was a Mars Bar jammed inbetween them. This is to ensure you keep the blood flowing when standing still for a long period of time.
Instructor: To keep the blood flowing don't forget to eat a Mars Bar. Don't fully eat a Mars Bar, and don't produce a Mars Bar.
Mar bar
Mar bar is used for a girl called Demi hardy she rammed it up her fanny
Eg: Lilly: did you hear about demi hardy ramming a mar bar up her fanny
Donohash and Cuminhand level of greasiness
Her dandruff flakes are on par (kellehers Mars bar) with cumin hands flakes
When a person accepts a shit into his or her mouth from another, usually a close friend.
Those two guys were really close, did you know they gave each other deep friend mars bars for christmas?
A now-closed drinking establishment formerly located in the East Village neighborhood of Manhattan. It was widely considered to be New York City's premier location for getting yourself stabbed or picking up a communicable disease.
Guy 1: After the Mars Bar, then what?
Guy 2: The doctor.
Finding a dog turd whle using a strimmer,spraying yourself and anything within 10 feet with shit.
Dave..You've been cutting the grass.
Barry.. How did you know?
Dave. You've got a bit of shit on you.Been strimming the mars bar.