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