I'm Tellin' All Y'All, It's Sabotage: Brit Footballers Suffer Plate Vandalism

Players for the UK's Motherwell football team have been suffering the ignominy of having their plates swapped while they play their matches, with one player becoming what we infer to be a "shitter" while another ended up as a "b**bag," an epithet we can't quite figure out. Figure there's a vowel in there, which narrows it down to a, e, i, o, u or sometimes y, and then you've got 20.5 consonants to choose from. Any across-the-pond readers wanna help us out with this one?

Players Hit by Rude Reg Prankster [The Daily Record, UK]

Related:
Go Ahead and Plate it Your Way [Internal]