Idioms/J

If you're a jack of all trades, you have many skills and can do many different jobs.

If musicians play in a jam session, they play whatever they feel like playing in an informal setting.

If you say "jobs for the boys" you're referring to the fact that people in positions of power sometimes use their power to give jobs to their friends or family members.

If you jockey for position, you try to get yourself in a good position in relation to others who're competing for the same opportunity or the same goal.

If something jogs your memory, it helps you to remember something.

If you have joie de vivre, you feel the joy of living.

You can say "Join the club!" to someone who has just experienced something unpleasant that you've also experienced, or to someone who's in an unfortunate position that's similar to your own.

If someone joins the ranks of a group or class of people, they become part of that group.

If two people or things are joined at the hip, they're so closely linked as to be almost inseparable.

If someone jumps down your throat, or jumps all over you, they strongly criticise you or scold you.

You can say someone "jumped for joy" if they were very happy about something.

If someone jumps on the bandwagon, they join a movement or follow a fashion that has recently become popular.

You jump out of your skin when something suddenly shocks you and your whole body jumps.

If you jump the gun, you start doing something too soon.

You can say you had to "jump through hoops" or "go through hoops" if you had to complete a lot of tasks before being permitted to do something.

If you jump to conclusions, you decide something is true, or make a judgement about something, before having enough information to be sure you're right.

Food that is bad for us because it contains large amounts of harmful substances like artificial colouring, preservatives, salt, refined sugar, and so on.

You can say "just in case" when describing a possible future problem and a precaution that has been, or should be, taken against it.

If you do something just in time, or just in the nick of time, you do it just before time runs out.

You can say "Just my luck!" when something goes wrong for you, or when something inconvenient happens.

You can say something is just shy of an amount if it's just short of that amount.

You can say something is just the ticket if it's the perfect thing or if it's exactly what's needed.

You can say something was just what the doctor ordered when it was exactly what was needed.

If something is the jewel in the crown, it's part of a group or set of similar things, and it's the best of them all.

We can say the jury is still out when a decision still hasn't been made about something.