Marten Skinn
A person who takes it upon themselves to police Skinhead fashion on social media. Its a pseudonym name mixing Doc Marten and a low socioeconomical spelling of the word skin. May have it's origins in southern England. Possibly Portsmouth.
"Skinheads didn't do up their top button, and shave that beard"
"can you not be a Marten Skinn"
"can you not be a Marten Skinn"