Carter could benefit by laundering his clothes more often, washing more often, and refraining from the physical ability from which his nickname is conferred.
While a loyal friend to Trev, which gets him seriously battered by the hard men, Carter is weak-willed, indecisive, and will run with the crowd rather than think for himself.
The star professional footballer let down by a bad choice of best friend who can so easily become a leech on him. Think of the role played by Jimmy "Two-Bellies" in the drink-related downfall of genuinely gifted flawed legend Paul Gascoigne - an ill-advised best friend who Gascoigne could not bear to lose on becoming famous and who provided embarrassment at best, and career-destroying drunken benders at worst.
Or virtually the entire Rooney family, a clan of Liverpool scallies so notorious that the fragrant Coleen wanted to exclude the entire tribe from her wedding to Wayne.