What does "foster" mean in this context?

Throw in the possibility of one of those phones that have two letters per key, and I think we have a winner.

Yes, and I realize that the sentence is ambiguous. It could mean “no beards and fosters, and moustaches…” Or it could mean “no beards. Fosters and moustaches…” I orginally read it as the former, but now I think it may be the latter.

Well, at least they didn’t accidentally type “no beards, goatse and mustaches”.

It’s a typo. They meant “posters.” As in piss off Dopers.

Fosters. Australian for beard.

I think you just won the thread.