before you can say knife

before you can say "knife"

Very quickly. I'll have the files done before you can say "knife."

See also: before, can, say

Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

before you can say knife

very quickly; almost instantaneously. informal

See also: before, can, knife, say

Farlex Partner Idioms Dictionary © Farlex 2017