soup up

verb

1. to modify (a vehicle or vehicle engine) in order to increase its power

2. Also: hot up.  hop up. to make (something) more exciting or interesting

adjective

1. (of a vehicle or vehicle engine) modified so as to be more powerful

   a souped-up scooter

2. more exciting or interesting

   a souped-up version of their last single

Idioms and Phrases

Make something more powerful; especially, add speed to an engine. For example, He was riding around in that car he'd souped up, or They had to soup up the sound system for the outdoor concert. [Slang; c. 1930]

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