AMERICAN IDIOMS (J)
Very crowded. ex. "The stadium was jam-packed on Saturday."
(To) jam on the brakes:
To hit/ step on the brakes suddenly to stop the car. *This phrases is a little antiquated. It's best to use "to hit the breaks" instead.*
A person who knows how to do a lot of different things.
(To) jump all over someone/ jump down someone's throat:
To criticize or blame someone. ex. "As soon as I told her I was going out with my friends, she jumped all over me."
(To) jump the gun:
To get something started too soon; to start too soon.ex. "We have to do a lot more work before we launch this product. We don't want to jump the gun."
(To) jump at:
To quickly accept. ex. "The journalist jumped at the chance to interview Ryan Gosling."
Almost. ex. "I'm just about finished."
Just a minute ago. ex. "He called me just now to tell me he was going to quit his job."
Just what the doctor ordered:
Exactly what is needed. ex. "This vacation is just what the doctor ordered."