Jack is always saying crazy stuff, and I think it would be cool for everyone to reply with their favorites. Ill start, me and my friends always say
"LET ME GET THIS GAY",
instead of let me get this straight, Something we heard Jack say one crazy thursday night!!:D

It ain't the 'Will and Grace Show' it's called 'Just Jack!' LOL that's the only one I can think of right now.

Referring to his headset: "Sidebar: How Madonna is this?"

I can't remember his exact words...but in the one where Grace broke up with Nathan and is all depressed and says how each one of them has their strongs points and how she isn't like that, when they all go in her room Jack says something like:

"You said that I was a great singer/actor...and I realized that...you DIDN'T say dancer...and I've always thought that the dancing was the strong point of my career...I'm so depressed."

LOL something like that. You guys probably have no idea what I'm talking about...

I always like it when he is shocked and says celebrities with 3 word names like

Jennifer Love Hewitt
Sarah Jessica Parker etc

I'm a HUGE Buffy, the Vampire Slayer fan, so any reference to the show just makes my day. But, I would have to say that the quote, below, in my signature would be my most favorite Jack quote.

the one that I LOVE (and this may be because i'm a MAJOR Nicole Kidman fan and in so being one I TOTALLY got the joke)
"You May have Penelope Cruzed You're way in but You can JUST as easily be Mimi Rogered out"