Idioms J	Back to Vocabulary..
Jack frost If everything has frozen in winter, then Jack Frost has visited
Jack of all trades A jack-of-all-trades is someone that can do many different jobs
Jam on your face If you say that someone has jam on their face, they appear to be caught, embarrassed or found guilty
Jekyll and Hyde Someone who has a Jekyll and Hyde personality has a pleasant and a very unpleasant side to the character
Jet set Very wealthy people who travel around the world to attend parties or functions are the jet set
Jet black To emphasize just how black something is, such as someone's hair, we can call it jet-black
Jobs for the boys Where people give jobs, contracts, etc, to their friends and associates, these are jobs for the boys
Jockey for position If a number of people want the same opportunity and are struggling to emerge as the most likely candidate, they are jockeying for position
Jog the memory If you jog someone's memory, you say words that will help someone trying to remember a thought, event, word, phrase, experience
Joe public Joe public is the typical, average person
Johnny come lately A Johnny-come-lately is someone who has recently joined something or arrived somewhere, especially when they want to make changes that are not welcome
Joined at the hip If people are joined at the hip, they are very closely connected and think or do things the same way
Judge and jury If someone is said to be the judge and jury, it means they are in charge of every decision made and it's outcome
Jump on the bandwagon If people jump on the bandwagon, they get involved in something that has recently become very popular
Jump the gun If you jump the gun, you start doing something before the appropriate time
Jump through hoops If you are prepared to jump through hoops for someone, you are prepared to make great efforts and sacrifices for them
Jungle out there If someone says that it is a jungle out there, they mean that the situation is dangerous and there are no rules
Jury's out If the jury's out on an issue, then there is no general agreement or consensus reached on it
Just deserts If a bad or evil person gets their just deserts, they get the punishment or suffer the misfortune that it is felt they deserve
Just for the hell of it When someone does something just for the hell of it, they do it without a good reason
Just for the record If something is said to be just for the record, the person is saying it so that people know but does not necessarily agree with or support it
Just in the nick of time If you do something in the nick of time, you just manage to do it just in time, with seconds to spare
Just off the boat If someone is just off the boat, they are naive and inexperienced
Just what the doctor ordered If something's just what the doctor ordered, it is precisely what is needed