I know stock phrases don't get their own pages anymore, but what trope would this go under:
A supporting character (usually a son or daughter) does something stupid, and the lead parental/older sibling figure asks a derivative of "What were you thinking?" Then the supporting character begins with "I didn't think..." only for the parental figure to interrupt them with "That's right, you didn't think!". Kind of a Dead Horse Trope
because it was used way too often on 1980s-1990s sitcoms.