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