J

[jump on] or [jump all over] or [land on] or [land all over]  {v. phr.},  {informal}

To scold; criticize; blame.

Tom's boss jumped all over Tom because he made a careless mistake.

Janice landed on Robert for dressing carelessly for their date.

 […]

[jump on the bandwagon] or [get on the bandwagon]  {v. phr.},  {informal}

To join a popular cause or movement.

[jump out of one's skin]  {v. phr.},  {informal}

To be badly frightened; be very much surprised.

The lightning struck so close to Bill that he almost jumped out of his skin.

Compare: [HAIR STAND ON END].

[jump pass]  {n.}

A pass (as in football or basketball) made by a player while jumping.

[jump the gun] also [beat the gun]  {v. phr.}

1. To start before the starter's gun in a race.

The runners were called back because one of them jumped the gun.

2.  {informal}

To start before you should; start before anyone else.

* /The new students  […]

[jump the traces]

See: [KICK OVER THE TRACES].

[jump the track]  {v. phr.}

1. To go off rails; go or run the wrong way.

The train jumped the track and there was a terrible accident.

The pulley of the clothesline jumped the track and Mother's washing fell down.

2.  {informal}

To change from  […]

[jump through a hoop]  {v. phr.},  {informal}

To do whatever you are told to do; obey any order.

Bob would jump through a hoop for Mary.

Compare: [TWIST AROUND ONE'S LITTLE FINGER], [UNDER ONE'S THUMB].

[jump to a conclusion]  {v. phr.}

To decide too quickly or without thinking or finding the facts.

Jerry saw his dog limping on a bloody leg and jumped to the conclusion that it had been shot.

Contrast: [LOOK BEFORE YOU LEAP].

[junked up]  {adj.} or  {v. phr.},  {slang},  {drug culture}

To be under the influence of drugs, especially heroine.