Verb

1. To give a severe beating to.

   I got beaten up by thugs on my way home.

2. To alarm by a sudden attack.
3. To sail to windward using a series of alternate tacks across the wind.
4. To cause by some other means, injuries comparable to the result of being beaten up
   • 2008 October 29, on Real Rescues (a British TV program):

     He [= a paraglider pilot] flew into a hill and beat himself up pretty badly.

5. To feel badly guilty and accuse oneself over something. Usually followed by over.

   Don't beat yourself up over such a minor mistake.

6. (WW2 air pilots' usage) Repeatedly bomb a military target or targets.
7. To get something done, derived from the idea of beating for game
8. To verbally assault repeatedly.

Adjective

1. Battered by time and usage; beaten up.