A member of a notorious outlaw motorcycle gang in Florida allegedly got so incensed at a faux biker’s Amazon-purchased biker duds that he slugged the imposter, according to a new report.

Michael Robbins, 52, was charged with aggravated assault, aggravated battery, robbery, and criminal mischief in the incident, which began when he spotted the 36-year-old victim wearing “fake motorcycle cuts” or vests, the Miami Herald reported.

Robbins, a member of the outlaw Pagans gang, was wearing a “Pagans Key West” shirt Saturday when he spotted the Virginia Beach man’s “Roman Empires Oceana” vest, which he and his bicycle-riding friends bought online for $15 each as a goof, the Herald said.

The man had been drinking at Sloppy Joe’s Bar in Key West with friends before running into Robbins.

The hulking biker allegedly told the man he was standing in “Pagan territory,” slugged in the face and demanded that he turn over his vest — then cut patches out of the garment with a knife, according to the report.

“If you ever come back to Key West, I will kill you,” he allegedly told the man.

Robbins was arrested Sunday and ordered held at the Stock Island Detention Center on $100,000 bond.