In descriptions of grinding and the Harlem Shake, twerk occurs with great regularity. The verb means “to move one’s buttocks in a suggestive way.” It has not yet made its way into OED and perhaps never will (let us hope so), but its origin hardly poses a problem: twerk must be a blend of twist (or twitch) and work (or jerk), a close relative of such verbs as squirm (possibly a blend of dialectal squir “to throw with a jerk” and worm) and twirl (? twist + whirl). When blends are coined “in plain sight” — as happened to brunch, motel, and Eurasia — no one has questions about their descent. Nowadays, blending has become a tiresome custom, and the stodgy products of grafting one word on another are usually as transparent as Texaco or Amtrak and equally inspiring. But no one can prove that twirl is indeed a sum of twist and whirl. Its origin will forever remain “unknown.” Be that as it may, twerk does look like a blend, even though we don’t know who, where, and when launched it into the linguistic space of North America.
He read: "The word twerking has now been added to the Oxford dictionary.
"Here's the definition they gave: To dance to popular music in a sexually provocative manner, involving thrusting hip movements and a low, squatting stance.'"
Freeman then told host Robin Meade: "This is the first time that I've ever heard of it."
Meade replied: "What? That's not true, you said it on the golf course yesterday. I'm pretty sure."
Freeman quipped: "Was I sober?"
SOURCE / Oxford University Press