souped-up

adjective5

1. •
   Improved.

   • As with the previous Omicron subvariants, it seems likely that the US will follow those regions once again, with or without the new souped-up vaccines. — 2022
2. •
   (slang) Of an engine, a motor vehicle, etc.: modified for higher performance.

   • $600.00 BUYS T. M. Scout with "Souped up" OX5 motor. Snappiest commercial single seater built. H. W. Mackie, Air Service, Houston, Texas. — 1925
3. •
   (US, slang) Intoxicated by alcohol or drugs.
4. •
   (US, slang) Excited.
5. •
   Of a racehorse: injected with a substance to make it run faster or to change its temperament.