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