Hmm...
In discussion that reach the point where my opponent is either being silly and impossible(or when I'm losing, and feel like being silly and impossible), I usually look my opponent square in the eye and say: "Yeah. And I've got a boner." It was orginally conceived by a friend of mine, but I can't remember WHY he thought it up.
Also, when something really awesome happens, a standard reply of mine is usually "I just came" or "I need a new set of pants."
EDIT: Oh, and I've got two more.
A friend of mine has the MGS codec-signal as his ringing tone on his cellphone. Last time I heard it, as he picked up, I put on my gruff voice and said "This is Snake. Ottacon, do you read me?"
Also, when I pick up the phone myself, depending on who's on the line I initiate with "Talk to me Goose!"