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8.
Army slang for a beating or very hard run with a kit.
"I just copped a beasting on Pen-y-fan."
by Diego July 29, 2003
 
9.
British military slang for rough treatment, often in the form of unofficial punishment or ritualistic bonding exercises for new recruits. May refer to hard training, beatings, sexual humiliation or any number of strange and unpleasant experiences.
'The new recruits were given a good beasting to lick them into shape.'

'The fat kid wasn't pulling his weight, so a bunch of us followed him into the bogs and gave him a quick beasting with a broom handle.'
by you evil twin October 15, 2006
 
10.
1. Slang term for the act of sexual intercourse.

2. British military slang for hard physical work out.
1. I want to give her a right good beasting.

2. We were beasting for several hours.
by Comrade John December 31, 2007
 
11.
almost professional

being really good
I'm beasting at this game.
by Adr_Rivera November 04, 2009
 
12.
The act of beasting; To act in a beast-like manner; To act argressively.
Yo. My dad's beasting at me.

He just beasted through that crowd.

Just beast it.

We'll just have to beast it.
by MangoGod January 11, 2005
 
13.
When an individual reaches such high level of anger that he/she acts like a beast.
That bitch is beasting because she found out that someone ate her corn muffins.
by chemikal June 27, 2003
 
14.
Fucking shit up verbally, or physically. When someone becomes so crazy, they need a cage or some other restraining device.
Man, THAT DEUS KID WAS BEASTING SO MUCH NOT EVEN TWO CAGES COULD CONTAIN HIM!
by Bill April 28, 2003