I don't know what was first but "ay caramba" and "D'oh!" have been in my vocabulary for while. "D'oh!" definately gets lots of use.
Other things that have worked their way in are Marges' "mmmmmm", Homer's "Idunno" complete with shoulder shrug and vacant look. His nervous finger twiddle, and occasionally the accompanying whine, is also a regular.
Others that make ocassional appearances are "excellent" and "ha ha".
But the one that I've noticed lately and which kind of bothers me is that when I am chugging something, esepcially in a bottle I find myself power slamming it like Barney (and many of the other characters) when they just tilt their head back and nearly suck the bottle inside out.
I've just been watching the Simpsons for too long.
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