| on the double(expression, fast, quick, speedy) |
| pronto(fast, quick, rapid, nimble) |
| ready(sharp, lively, fast, quick) |
| speedball(fast, quick, summary, nimble) |
| supersonic(prompt, fast, quick, rapid) |
| PDQ(quick, rapid, nimble, speedy) |
| blue streak(expression, quick, nimble, speedy) |
| chop-chop(quick, rapid, nimble, speedy) |
| double-time(quick, rapid, nimble, speedy) |
| flashing(quick, rapid, nimble, speedy) |
| fleeting(quick, rapid, nimble, speedy) |
| hairtrigger(quick, rapid, nimble, speedy) |
| hypersonic(quick, rapid, nimble, speedy) |
| in a jiffy(expression, idiom, quick, nimble) |
| lickety split(expression, quick, nimble, speedy) |
| like a bat out of hell(expression, idiom, quick, nimble) |
| like all get out(expression, idiom, quick, nimble) |
| like crazy(expression, quick, nimble, speedy) |
| like mad(expression, quick, nimble, speedy) |
| posthaste(fast, quick, nimble, speedy) |