Keep smiling informal verb phrase
To maintain a positive and optimistic attitude or demeanor, especially in the face of hardship or adversity
I know you're worried about your father's health, but you try to keep smiling.
A: My first day at work was bad. B: Keep smiling! Don't be discouraged! You will get used to it soon.
To make someone feel more confident or happy, especially when they thought that they can't achieve what they want
Happy or cheerful; in a good mood
To smile broadly
Used to allude that the last force, problem or burden which is seemingly minor and small causes a person, system or organisation to collapse or fail
Her husband's violent act last night was the straw that broke the donkey's back and she left him