soup up
verb1
Informal To modify the engine of (a motor vehicle) to give a higher performance than the specifications.
- Imagine souping up a Mini with a Cosworth engine: the car would fly.2009 October 19, Paul Rees, “Flying backs become walking wounded as blitz defence has its impact”, in The Guardian:
2
Broadly, Figuratively To embellish with many additions.
- They are dickering over a tax cut small enough, in a bill "souped" up with gadgets, to escape or override a veto.1948, Harley L. Lutz, "Taxes and Jobs," Institute of Business and Economic Problems: A Series of Lectures, page 25: