let it rest

let it rest

To cease discussing or dwelling upon a given subject. Look, we can't afford a new car right now, so just let it rest already!
See also: let, rest
Farlex Dictionary of Idioms.

let it

/'er rip Informal
To allow something to start or happen with vigor or energy.
See also: let
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • let (something) rest
  • let down (one's) hair
  • let (someone or something) get out of (something)
  • let (someone or something) get out
  • let us (do something)
  • Let us do
  • let out
  • let out (some sound)
  • let it roll
  • Let it roll!