I. rev up phrasal verb informal (see also rev)
if you rev up a system or organization, or if it revs up, it becomes more active
rev up 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.

[TahlilGaran] Dictionary of Contemporary English ▲

II. rev¹ /rev/ (also rev up) verb (past tense and past participle revved, present participle revving) [intransitive and transitive]
if you rev an engine, or if an engine revs, you make it work faster
rev up phrasal verb informal
if you rev up a system or organization, or if it revs up, it becomes more active
rev up 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.

[TahlilGaran] Dictionary of Contemporary English ▲

rev something up
to make an engine run very fast
The young man began to rev the motor of his car up while he was waiting for his friend.

[TahlilGaran] English Idioms Dictionary ▲

rev up
to make an engine run very fast
The young man began to rev the motor of his car up while he was waiting for his friend.

[TahlilGaran] English Idioms Dictionary ▲

rev up
v. phr., informal, slang
1. To press down sharply several times on the accelerator of an idling car in order to get maximum acceleration.
The race driver revved up his car by pumping his accelerator.
2. To get oneself ready in order to accomplish a demanding or difficult task.
The boys were getting all revved up for the football game. See: PSYCHED UP.

[TahlilGaran] English Idioms Dictionary ▲