Trope where one parent has a rivalry with one of their child’s friends?
I have no idea if this is even a trope, but… Best example I can think of is in the movie Big Time Adolescence. The protagonist, Mo, is a high schooler who’s best friend, Zeke, is a 22 year bum (and a terrible influence). Mo’s mother is apathetic to the whole situation but his dad openly cannot stand Zeke and is always suspicious of him, which leads to a sort of comical rivalry going on between them. Can anyone think of any examples of a relationship like this?