quick as a flash

flash back

To recall or remember something; to experience a flashback.

flash for cash

Pertaining to a scam where a motorist flashes their headlights to indicate to another driver to proceed against normal give-way rules, then runs into them and sues for damages.

flash the cash

To spend money, especially in an ostentatious manner; to pay up.

make quick work of

To accomplish a specified task easily and quickly.

quick as lightning

Extremely quick.

quick buck

A large sum of money earned easily and quickly.

quick off the mark

fast to act or react

quick on one's feet

sharp-witted.