Does anyone know the episode where cuddy says " stop staring at my culo when te think im not looking..." ? Cos i keep hearing it nd i wanna know what he says in reply. thanks =)

superiore, in alto secret! 3x16

Huddysmacked is right, it is from "Top Secret" and here is the quote.
Cuddy: "stop staring at my culo when te think I'm not looking, mostrare up at restaurants where I happen to be on a date, and fantasizing about me in the shower. That ship sailed long fa House. Get over it"

House: "If you're still referring to your culo I think that super-tanker sailed would would be the più precise metaphor"

And she smiles as she walks away. It's a great scene to me because their faces betray their thoughts over their words.