1 general:: Phrase(s): You must lose a fly to catch a trout. Prov. You have to sacrifice something in order to get what you want. (Implies that what you sacrifice is minor compared to what you will get.) • Amy was willing to live cheaply for several years in order to save enough money to buy her own house. She knew that you must lose a fly to catch a trout.
McGrawhill's American Idioms And Phrasal Verbs