let rip

verb3

1. •
   To utter or release without restraint.

   • She let rip with a tirade everyone heard.
   • She let rip about Mary’s flirting with Lizzie’s boyfriend.
2. •
   (informal) To unleash, let loose, uncork; to allow (something) to happen or proceed without restraint.

   • When she heard the news, she let rip a tirade heard throughout the office.
   • Ok, it’s all clear. Let ’er rip.
3. •
   (slang) To fart.

   • I would also urge you never to let rip within 50 metres of your mother-in-law — 2012