From Longman Dictionary of Contemporary Englishrev up phrasal verb informalif you rev up a system or organization, or if it revs up, it becomes more active for They are revving up for one of the biggest fund-raising events ever organized.rev something ↔ up Investors keep putting money in U.S. companies, revving up the economy even more. → rev→ See Verb table
Examples from the Corpus
rev for• Guys revving up for football can watch it and hoot and holler for the teams. 