"nerds"
@noelle on the other hand, I never had it used against me as a serious pejorative in the past; if I had, I might well be less casual about using it now. and I'd never use it with somebody I didn't consider a nerd-buddy, or somebody who wasn't ok with it.
so for me, being greeted that way by a stranger doesn't set off any particular emotional connections one way or another. (isn't very helpful in this conversation, sorry)