Scots. A derogatory term for a contemptible and stupid person. It's origins derive from the aroused state of the penis and hence is used only as a term of abuse for males; although as the genders are becoming harder to distinguish in certain housing schemes in and around the city of Glasgow this can no longer be guaranteed. If one is behaving in a ridiculous manner, and apparently irritable to everyone in the vicinity, one can expected to be denounced as a 'throbber'.
Heh Bawbag, stope actin' like a throbber.