I've actually picked up my acoustic for the first time in 10 years, and yes my fingers are bleeding trying to play it...

Anyway, I have a question about the playing of the song chords that you see on various internet sites (usually under the heading 'tabs' although there's no tab). I can understand the general chord names 'G' 'Bm7' etc. when I see them but some of the songs have stuff like 'G/F#' in the space of one chord. I know what 'G' and 'F#' are seperately but what does it mean when they're placed together like that with a '/' in between?

Any ideas? Any help much appreciated.