gun up(to act or function with great speed, intensity: a car full of sleepy night owls would go gunning up the Pacific Coast Highway toward Belmont ShoreКГА)
tap the brakes(автомобиля: "Whoa! That SUV didn't even tap the brakes!"; в переносном смысле означает: "не будем торопиться в нашей беседе", "let's slow down here for a moment": "Let's tap the brakes here for a moment and try to remember what you did on the evening of May 29, between 7 and 9?"ART Vancouver)
keep a cap on it(The phrase "keep a cap on it" means to restrain or limit something, usually to prevent it from increasing or getting out of control. It is often used in the context of controlling costs, emotions, or any situation where moderation is necessary: To ensure the project stays within budget, we need to keep a cap on our expenses and prioritize cost-effective solutionsvogeler)
