JACK

(MAN) [noun] [C] - (esp. used in phrases) a person, esp. a man(used by or to children) Jack Frost is cold and ice thought of as a man.It feels as though Jack Frost is coming (= The weather is getting very cold).A jack-in-the-box is a children's toy consisting of a box with a model of a person inside it which jumps out and gives you a surprise when the top of the box is raised.(figurative) She was up and down to the phone all morning like a jack-in-the-box.A jack-of-all-trades is someone who can do many different jobs.A mother has to be a jack-of-all-trades - cook, nurse, teacher, sports coach and lots more!(US) A jack-o'-lantern is a light made from a hollow pumpkin with holes cut into the sides like the eyes and mouth of a person's face, inside which there is a candle.(dated) If something happens before you can/could say Jack Robinson, it happens very quickly.I put the plate of food on the floor and before you could say Jack Robinson the dog had eaten it.(UK informal) A Jack the Lad is a young man who behaves in an over-confident way which makes you notice him.(saying) 'Jack-of-all-trades, master of none' means a person is able to do many things but is not really very skilled at any of them.