Memory Idioms 2Versión en línea Players will try to match the idiom with it's meaning. por Lunarn Smith Don’t start problems or cause trouble Let the cat out of the bag Very expensive Let sleeping dogs lie Once in a blue moon It’s not rocket science Ants in one’s pants Work until late at night Happens very rarely; uncommon Hold your horses Wait and be patient Good idea or invention Burn the midnight oil Best thing since sliced bread Can’t stay calm (relax) because you’re nervous It’s not hard. Cost an arm and a leg Tell a secret