early bird - someone who always gets up very early in the morning, worm - to obtain information from (someone) by cunning persistence, night owl - someone who enjoys staying awake all night, dark horse - someone who does not tell people much about themselves, but who has surprising qualities or abilities, dog - to cause trouble for a long time, wolf in sheep's clothing - someone who seems to be friendly or harmless but is in fact dangerous, dishonest, bookworm - someone who likes reading very much, ram - (an adult male sheep) to run or drive into something very hard, monkey about/around - to behave in a stupid or careless way, dog's life - a life that is difficult and unpleasant, with very little pleasure, lame duck - a person, business etc that is having problems and needs help, dog-collar - a stiff round white collar worn by priests, badger - to try to persuade someone by asking them something several times, duck down - to lower your head or body very quickly, especially to avoid being seen or hit, hen party - a party for women only, that happens just before one of them gets married, fox - to confuse or deceive someone in a clever way, dog-eared - used so much that the corners are turned over or torn, guinea pig - someone who is used in a scientific test to see how successful or safe a new product, system etc, puppy fat - fat on a child's body, that disappears as they get older, cold fish - an unfriendly person who seems to have no strong feelings,

Idioms: Animals with definitions

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