Funny Joke

A child is playing ROBLOX when someone says "IDGAF". She asks her dad what it means.
Girl: What does IDGAF mean?
Dad: I don't give a f***.
The girl, unaware that that is the correct answer, storms off to her mother.
Girl: What does IDGAF mean?
Mom: I don't give a f***.
She gives up.
The next day, the girl and her parents are out walking when a teen says LOL. The adults are not familiar with these kind of acronyms, so they ask thier daughter.
Parents: What does LOL mean?
Daughter: I don't give a f***.