Scrapie
The name scrapie is derived from one of the clinical signs of the condition, wherein affected animals will compulsively scrape off their fleeces against rocks, trees, or fences. The disease apparently causes an itching sensation in the animals. Other clinical signs include excessive lip smacking, altered gaits, and convulsive collapse.
Sharpies (Australian subculture)
Sharpies, or Sharps, were members of suburban youth gangs in Australia, most significantly from the 1960s and 1970s. They were particularly prominent in Melbourne, but were also found in Sydney and Perth to lesser extents. Sharpies were known for being violent, although a strict moral code was also evident. The name comes from their focus on looking and dressing "sharp".