The ex-Newcastle United star has aimed strong criticism at the current skipper.
Indeed, in an open letter to the Magpies squad, the 53-year-old has publicly told the Argentine in no uncertain terms that he has 'never' led by example throughout the entirety of the Premier League campaign.
Quinn wrote: "For me Fabricio, you have never led by example all season. Especially the times when you were sent off and some of the shambolic performances.
"The players have underperformed in the second half of the season and, of course, the first few games."
Quinn proceeded to express a few more home truths to the Newcastle players but this was the most direct retort to Coloccini's own open letter to fans earlier this week.
It isn't the first time the former Newcastle star has spoken out in recent weeks, of course, with Quinn taking to Twitter with some strong words after the club's embarrassing defeat to Leicester City - their eighth in a row.
And Quinn, meanwhile, is far from the first ex-player or pundit to slam Coloccini. Indeed, Phil Neville branded the Argentine an 'absolute disgrace' on Match of the Day recently, which feels like fair criticism indeed.
Will this latest open letter - the first that doesn't contain a weak, manufactured message from a player (or likely their representative) - make any difference when Newcastle take on West Brom this Saturday afternoon?