noun

• (dated) A female domestic servant, especially one employed for menial work.
  "And then Somerset looked at the boys′ skivvy, and saw a well set up young woman with a red round face, an angry face just then but underneath the anger a pleasant one."
• (military slang, Vietnam War) A prostitute.
• (US, Australia, New Zealand) A close-fitting, long-sleeved T-shirt with a rolled collar.
  "Then dark blood squirts from a little hole in Sergeant Gerheim's chest. The red blood blossoms into his white skivvy shirt like a beautiful flower."

verb

• (intransitive) To perform menial work; to do chores, like a servant.
  "We went out by turns, or sent out the apprentices who skivvied for us, to fetch in roast pork […]"