let it rip

let (something) rip

1. To let something go; to start something up. Often used as an imperative. OK, the rocket is ready to launch. Let that thing rip! I replaced the spark plug, so go ahead and let it rip 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 rip.
2. To do something without inhibition or restraint, typically with great enthusiasm or force. Wow, did you see that kick? He really let it rip. When I'm writing a first draft, I like to just let it rip and not worry about typos or grammar.
See also: let, rip

let it rip

1. To let it go; to start it up. Often used as an imperative. OK, the rocket is ready to launch. Let it rip! I replaced the spark plug, so go ahead and let it rip 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 rip.
2. To do something without inhibition or restraint, typically with great enthusiasm or force. Wow, did you see that kick? He really let it rip. When I'm writing a first draft, I like to just let it rip and not worry about typos or grammar.
See also: let, rip
Farlex Dictionary of Idioms.

let it rip

Also, let her rip. Go ahead, proceed unchecked. For example, Once you get the tractor started, let it rip. The use of her in the variant comes from a tradition of referring to vehicles as feminine. [Mid-1800s]
See also: let, rip
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • let (something) rip
  • let her rip
  • let rip
  • let something rip
  • let it roll
  • Let it roll!
  • let in
  • let us (do something)
  • Let us do
  • let grass grow under feet