rip

let it/her rip (mainly American, informal)

if someone lets a vehicle rip, they make it move very fast. She put her foot on the car's accelerator, and he said, 'OK, let her rip'.

See also: let

let rip

1. to suddenly express your emotions without control. This time I was furious and I let rip. He's a very restrained sort of person - you can't imagine him ever really letting rip.

2. to allow gas to escape from your bottom loudly. You can't just let rip when you're in a smart restaurant.

See also: let

a rip-off (informal)

something that is not worth as much money as you have to pay for it. Mobile phones can be a real rip-off if you're not careful.

rip-roaring

very exciting and successful. The show was a rip-roaring success. (always before noun) The car was launched with a rip-roaring publicity campaign.

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let it rip

1. to make a vehicle or machine move very fast. He would get up early Sunday mornings, fire up the lawnmower, and let her rip.

Usage notes: the pronoun her is often used to refer to a machine

2. to do something with energy and enthusiasm. Hendrix would walk into a recording studio, turn on his amp, and let it rip while the tape recorder rolled.

See also: let

rip someone off

1. to cheat or deceive someone. If your kids lie to you, you feel emotionally ripped off. She offers advice on how you can keep restaurants from ripping you off.

2. to steal from someone. He admitted he had ripped off a drug smuggler and blown up his boat. I have a great idea for a book, but I don't want the publisher to rip me off.

rip something off

to steal something. Two students ripped off a fund for leukemia patients. I ripped off the idea from an old friend.