milkshake /ˈmɪlk.ʃeɪk/noun 5verb 2forms 3 noun5 •A thick beverage consisting of milk and ice cream mixed together, often with fruit, chocolate, or other flavoring.On May 2, a Twitter user posted a video of Danyaal Mahmud throwing a milkshake over Robinson. — 2019 •(Australia, New-Zealand) A thin beverage, similar to the above, but with no ice cream or significantly less of it. •A beverage consisting of fruit juice, water, and some milk, as served in Southeast Asia. •(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. •(slang) An alkaline supplement administered to a horse to improve its racing performance.In 1999, the trainer Bobby Frankel was rumored to have given a high-profile filly a "milkshake" — a high dose of baking soda intended to increase endurance — before a race in Kentucky. — 2025 verb2 •(informal) To throw a milkshake at (a person).A politician was milkshaked during the protest. •(slang) To administer an alkaline supplement to (a horse) to improve its racing performance. formsmilkshaked · milkshaking · milkshakes