Important Idioms and Phrases starting with “J” Idioms and Phrases Meaning Sentence Jump the gun Do something too early, especially without thinking The media jumped the gun and gave out their verdict of the scandal even before the investigation was complete Jack of all trades somebody who has many skills or who is versatile in every field. Sandeep is the jack of all trades as he can teach, sung and do many different jobs at a time. Jump to conclusion form an opinion or judgement hastily. Wait till we get the report; don’t jump to a conclusion. Jam on the brakes to press the brakes suddenly and in a hard way. I had to jam on the brakes because a kid suddenly appeared from nowhere and crossed the road. John Hancock A person's signature. Put your John Hancock at the bottom of the will. Jump on the bandwagon To profit from a craze; to join a trend. After the incredible success of the new product, the company has jumped on the bandwagon and released a new version of i...
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