milkshake

Etymology

milk + shake.

noun

1. A thick beverage consisting of milk and ice cream mixed together, often with fruit, chocolate, or other flavoring.
2. (New England, Australia, New Zealand) A thin beverage, similar to the above, but with no ice cream or significantly less of it.
3. A beverage consisting of fruit juice, water, and some milk, as served in Southeast Asia.
4. (mechanics, informal) Accidental emulsion of oil and water in an engine.
   This milkshake under the oil cap, or on the dipstick, indicates a blown head gasket.
5. (slang, horse racing) An alkaline supplement administered to a horse to improve its racing performance.

verb

1. (transitive, slang, horse racing) To administer an alkaline supplement to (a horse) to improve its racing performance.
2. (transitive, informal, neologism) To throw a milkshake at (a person).
   A politician was milkshaked during the protest.
   Indeed, the day before Farage was milkshaked, Leave EU issued an unauthorised, and now withdrawn, re-edit of a Beastie Boys video, showing him and Ann Widdecombe pouring beer over their political opponents. May 26 2019, Stewart Lee, “Are milkshakes the new politics of resistance?”, in The Guardian