Shut up, dumbass!

A stress management specialist is over at the Formans' house to find out the source of Red's stress/high blood pressure.

SMS (to Red): I think I know what the problem is. I believe the source of your stress is your son.
Red: Him? (Points at Eric)
Eric: Me?!
Red: You think my problem is my own son? My son is a fine young man.
Eric (baffled): Wow, dad you don't-
Red (cuts Eric): Shut up, dumbass!