in a snap

in a snap

At once; nearly immediately or very quickly or suddenly. Our storewide sale will only be available as supplies last, so be sure to hurry—these deals are going to be gone in a snap! When faced with the need to save costs, the management decided the fates of lower-level workers in a snap, without any serious deliberation.
See also: snap

in a snap

in a moment; almost immediately. informal, chiefly North American
See also: snap