Beast(ly) - adj. The characteristic of being good at something, or doing something incredible. (As a beast)
Dude: Way to be beastly by going up those stairs with your broken leg!
Dude: Yeah, it was beast when you got up there and sang in front of the school.
by T.D.V. April 15, 2008
Just IMMENSELY buff/fit/athletic
or just all around awesome
(Blank) "Dude did you see Ryan tackle that guy at the game "

(Friend) "Yeah dude hes beastly!"
by Nowa Chuck Norris October 10, 2009
When a person or something are particularly skilled in some certain aspect.
Woah Ben is beastly at dancing the tango!
by Pawlin February 6, 2008
Word sometimes used to describe someone who is acting weird and/or dumb. (Usually somewhat embarrassing)
Stew: Hey, did you see that Luke wore all neon orange to the dance?
Marvin: Yeah! That was so fuckin beastly!
by Jack E. Lopes June 20, 2017
1. When refering to a female, beastly means she is just that. A beast you would not want to go anywhere near.

2. When referring to anything else, it simply means large or impressive.
1. I would not go near that beastly she-bitch, not even to talk to her hot friend!

2. That is one beastly truck you have there.
by JakeStar August 17, 2005
To be the or close to the best at one particular subject, affair, fight, game, ordeal, etc.

Can be prounounced 'bestly', in comparison to the accepted pronunciation 'beestly'.
He is so beastly at everything, that everyone voted him to become king of the universe and everyone will behold his rule.
by imfightingthisjihadtoo April 26, 2008
Being good at a certain things
K1: Did you see how she hit that ball?
K2: Yes, it was very beastly.
by Jordyn Hall May 6, 2005