Not give a hang (about something) verb phrase
To be unconcerned about someone or something.
I don't give a hang what people think!
When I'm a famous musician, people won't give a hang about my knowledge of atoms and molecules.
He doesn't give a hang whether he passes the exam or not.
Be outside the ability or willingness of someone to care more about a particular person or issue
How's it going?; how are you?
An individual should only work on and care about his or her work, and should not interfere with others.
To spend a lot of effort, time, and care on doing something.
Daughter: So I really want all my friends to have a great time. I was thinking it would be a good idea to have some candy out on the tables for people to snack on.
Mother: Well, if you want them to really enjoy themselves, candy is dandy but liquor is quicker.