Jake-brake definition

(slang) Especially on trucks, an engine compression brake that closes the valves in an engine in order to slow the vehicle; an engine retarder.
noun
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Other Word Forms

Noun

Singular:
jake-brake
Plural:
jake brakes

Origin of jake-brake

  • From JakeBrakeTM brand compression brakes. Though a brand name, this term is often used to refer to the device in general.

    From Wiktionary