grind up

Short definition from Wiktionary

Verb

1. 1
   To reduce (something) to powder by grinding.
2. 2
   To dance in a sexually suggestive manner close to another person.
3. 3
   To wear down on (someone); to be extremely draining or stressful; to cause burnout.
4. 4
   To skateboard on a surface or in a location.