Definition of "milkshake"

A thick beverage consisting of milk and ice cream mixed together, often with fruit, chocolate, or other flavoring.  examples

(New England, Australia, New Zealand) A thin beverage, similar to the above, but with no ice cream or significantly less of it.  examples

A beverage consisting of fruit juice, water, and some milk, as served in Southeast Asia.  examples

(mechanics, informal) Accidental emulsion of oil and water in an engine.  examples

(slang, horse racing) An alkaline supplement administered to a horse to improve its racing performance.

(transitive, slang, horse racing) To administer an alkaline supplement to (a horse) to improve its racing performance.

(transitive, informal, neologism) To throw a milkshake at (a person).  quotations