In the chorus there’s a sample of a girl saying something, but damned if I can figure out what it is. I can’t stand to listen to the song because it annoys me so much that I can’t figure it out.
I spot-checked a few lyrics sites, but the ones I looked at didn’t seem to say. Sounds kind of like “be me” or “believe me”.
In the sheet music in this month’s issue of Guitar World, it’s written as “Can you gimme”. I think it sounds more like “gimme gimme”, which I guess makes sense in the context of the song.
When they played the song at Coachella Festival, of course there was no girl on stage, so we the audience took it upon ourselves to fill in the blanks. I thought it was “Jimmy” or “Gimme” but I heard a lot of “Living” being shouted out.
About the closest I’ve seen to official word is by Karl, weezer’s webmaster and photographer, found here.
He mentions different versions of “Beverly Hills” floating around with the “gimme gimme” lyrics sung by male and female voices.