skank

In reggae and ska music, a skank is a rhythmic guitar or keyboard stroke—the choppy upbeat that gives those genres their distinctive bounce: The guitarist laid down a steady skank.

That's a classic skank rhythm.

To skank is to dance to ska or reggae with this rhythm.

Separately, skank is a derogatory slang term for a woman considered promiscuous, dirty, or trashy—nastier than slut because it implies not just promiscuity but unattractiveness or poor hygiene: He called her a skank behind her back.

The insult is harsh and intended to wound.