Beat has several meanings depending on the context.
1. It can mean that someone (generally a girl) is ugly, similar to kicked
2. It can mean to engage in sex, generally from a dominant or male point of view, i.e. "beat that pussy".
3. It can mean to masturbate, similar to whack
, i.e. "beat off".
4. It can mean to win or defeat.
5. It can mean to attack someone.
1. Damn that girl has a nice body but she is beat!
2. I'm gonna beat dat pussy up all night!
3. I caught him beating off in his room, so embarrasing.
4. We beat you guys fair and square, so pay up.
5. Jamal beat up his girlfriend last night, again!