twerk

Short definition from Wiktionary

Noun

1. 1
   Synonym of twerking (“a sexually-provocative dance, involving the performer thrusting their hips back from a low squatting stance while shaking their buttocks”).
2. 2
   A fitful movement similar to a twitch or jerk.
3. 3
   A puny or insignificant person, generally male; a twerp.
4. 4
   An abrupt call, such as that made by the California quail.

Verb

1. 1
   To dance in a sexually-provocative way using hip thrusts in a low squatting stance while shaking the buttocks; to take part in twerking.
2. 2
   To twitch or jerk.