1. quick as a flash - Adjective
2. quick as a flash - Adverb
quick as a flash (not comparable)
(idiomatic, simile) Extremely quick.
Synonyms: fulgurant, fast as lightning, lightning fast, lightning-quick, in a flash
quick as a flash (not comparable)
(idiomatic, simile) Extremely quickly.
Synonyms: lightning fast, in a flash, lightningly
He took the Who's feast, he took the Who pudding, he took the roast beast. He cleaned out that ice box as quick as a flash. Why, the Grinch even took their last can of Who hash. Dr. Seuss