Relier Pairs LanguageVersion en ligne Idioms par Fernando T. 1 A couch potato 2 Cost an arm and a leg 3 Butterflies in my stomach 4 I am under the weather 5 Hit the sack 6 In hot water 7 My blood is boiling 8 It’s raining cats and dogs 9 A piece of cake Something that you say when it is raining heavily Go to sleep! I am sick! I am very angry! A person who doesn’t have an active life Very easy! Very expensive To be in difficulties Nervous and anxious