The Fresh Prince Of Bel-Air: The Mother Of The Battles
Series 2 episode 2 from 1991.
Ashley is bullied by a girl at school and Carlton and Will intervene.
It doesn’t work out though and Phil and Viv invite her parents over to discuss the situation.
That definitely goes pear-shaped, as the girl’s parents belittle the Banks family.
It ends up with Phil punching the dad.
Movie pages here.