let it roll

let it roll

1. To let it go; to start it up. Often used as an imperative. OK, the rocket is ready to launch. Let it roll! I replaced the spark plug, so go ahead and let it roll so we can see if there's any difference. We've spent so long working on this ad campaign that I'm excited to finally let it roll.
2. To do something without inhibition or restraint, typically with great enthusiasm or force. Wow, did you see that kick? He really let it roll. When I'm writing a first draft, I like to just let it roll and not worry about typos or grammar.
See also: let, roll
Farlex Dictionary of Idioms.

Let it roll!

verb
See Let her rip!
See also: let
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • Let it roll!
  • let rip
  • let something rip
  • let (something) rip
  • let her rip
  • let it rip
  • let grass grow under feet
  • let the grass grow under (one's) feet
  • let (someone or something) get out
  • let in
References in periodicals archive
The Very Best Of Luck Millinder (COL-CD-2898, $16.97) offers 24 classic tracks from "I'm Waiting Just For You; Let It Roll Again; and Who Said Shorty Wasn't Coming Back; to Bongo Boogie; The Right Kind of Lovin'; and It's A Sad Sad Feeling.
Collectables Records Corp
If it isn't true, ya just gotta let it roll. What if somebody called you a pink elephant?
Stop sweating the small stuff