What is your favorite movie insult?

I got a kick out of the insulting Frenchman in Monty Python/Holy Grail " I fart in your general direction! Your Mother is a Hamster and your Father smells of Elderberries!" ..... absolute nonsense

The exchange of dialogue between the hero and the villain in the Hitchcock movie [i]North by Northwest.[/i]

Roger Thornhill (Cary Grant), who has been mistaken for a spy, rages at spymaster Phillip Van Dam (James Mason). Van Damm believes Thornhill is faking his anger.

Van Damm: You fellows need a little [i]less[/i] training from the CIA...And a little [i]more[/i] from the...Actor's Studio.

Thornhill: And I suppose [i]you[/i] want me to play dead!!!

Van Damm: [i]Your very next role[/i]. You will be very convincing, I assure you.

The Dude: Yeah, well, you know, that's just like, uh, your opinion, man.

Donnie:Your such a FUCK ASS!
Elizabeth: lolDid u just call me a Fuck Ass? Elizabeth:well you can go suck a fuck!
Donnie: oh plz tell me Elizabeth how does one suck a fuck??!!

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You eat dog crap for breakfast geek
You play ball like a GIRL!!

This is classic for me:
[youtube=https://www.youtube.com/watch?v=6piUQsaOOSQ]