What's wrong with "kvetch"? The only things I can think of are just less interesting synonyms, like "gripe" and "carp". Of course, if Buffy used the word "carp," there'd have to be a joke about fish. (She'd probably say "trouting" and everyone would look at her funny until it was finally all sorted out that she meant "carping.")
"Catch some rays" is horribly cheesy, and also something Buffy might say to make fun of surfers. So she'd probably say, "Catch some rays and then say "dude" a lot, and maybe bleach your head?"
It really depends on what you mean; it's easier to think of things like this when they're in context. If you're writing a fic and need help or a beta, I'd be happy and grateful to oblige.
In the meantime, sorry I can't be of more help. I'll think on it for you some more, but don't bet on me being interesting or coming up with anything better ;o)
Re: Off Topic!
"Catch some rays" is horribly cheesy, and also something Buffy might say to make fun of surfers. So she'd probably say, "Catch some rays and then say "dude" a lot, and maybe bleach your head?"
It really depends on what you mean; it's easier to think of things like this when they're in context. If you're writing a fic and need help or a beta, I'd be happy and grateful to oblige.
In the meantime, sorry I can't be of more help. I'll think on it for you some more, but don't bet on me being interesting or coming up with anything better ;o)