Crossword clues for the word: SOUPUP The word SOUPUP has appeared as an answer to at least 10 crossword clues on different crossword puzzles. Crossword clues for SOUPUP Showing 1 to 10 of 10 results Clue(s) "Add juice to, as an engine: 2 wds." "Improve, slangily" "Increase the power of, as an engine" "Make more awesome, as a car" "Slang, increase engine output (2)" Add horsepower Goose the auto engine Improve a muscle car engine Make more powerful Turbocharge