A: I wasted three whole years on a project that goes nowhere.

B: Come on, the project was not a total failure — chin up!

Note: This is the same as “keep your chin up,” an expression dating back to late 19th and early 20th century in the United States. This is a phrase that encourages one to improve one’s mood, especially when sad or discouraged. The first printed reference came from an October, 1900 edition of the Pennsylvania newspaper The Evening Democrat: “Keep your chin up. Don’t take your troubles to bed with you – hang them on a chair with your trousers or drop them in a glass of water with your teeth.”