Man, Woman, Hench or Beast that dabbles in Performance Enhancing Substances often described as "Steds" (Street for "Steroids") in order to look Hench, Buff, Swole or Ripped
You seen that Geezer over there mate? He's Hench, but I bet he's a "Sted Head".
Or
You stoopid F****n "Sted Head" Bouncer
Or
You seen Danny these days? He's a right "Sted Head" now but he's propper swole innit....