Biff: Hey, listen, I'm going to make a man out of you, kid. Here come on, come on, try this. Come on.
Timmy: (taking a sip) It's gross.
Biff: You bet it's gross, it's beer, kid. It's beer.
Timmy: Make my day.
Referencing police detective Harold Francis "Dirty Harry" Callahan, played by Clint Eastwood in five movies from 1971 to 1988. The character is a cop who refuses to play by the rules, constantly challenges his superiors, disregards orders, and ultimately believes in justice rather than the letter of the law. "Make my day" was the character's signature line in the 1983 Sudden Impact.