I was a metal fabricator back in the '70's and worked on some of the offshore rigs in So. Cal.
I was, and still kinda sorta am, tall with wide shoulders and skinny.
My co workers gave me the nick name of Flatbar, guess it's better than Slag or Beadrunner.
We had one guy who came to work dirty every day, almost like he never left work. His name was Phil, his nickname was Philthy.