a minor
a person who is younger than a certain age, and that age is usually 18, but sometimes it’s 15 or 21, and they get mad if they can’t do what they want
My brother said he was a minor and couldn’t go to the club, but then he walked out of the club like he owned it.
My little cousin said she was a minor and tried to drink, and then she cried when she got kicked out.
My friend said he was a minor and tried to buy a car, and the dealer said, 'You're not old enough to own a car, but I still want your money.'