noun

• (Australia) A senior school student, especially a school-leaver, engaged in unsupervised celebrations during schoolies week.
  "Known as the Drug Awareness Network, it was able to find funding assistance for its work from the National Drug Education unit. The network devised a programme of activities which was later advertised to intending Schoolies by helpers walking the streets and distributing leafets containing information about forthcoming events."
• (Australia) A schoolteacher.
• (UK, military) An education officer.
  "Arbroath, being a training station for young naval airmen, also housed several ‘schoolies’ (education officers), four of whom lived in an adjacent building to mine. I quickly struck up a close friendship with two of the schoolies, Ron Horner and Vivian Price."
• (US, fishing) A juvenile gamefish (especially striped bass) at a stage where it tends to swim with others in schools rather than stay to itself.
  "1997 August, Lawrence Pine, Massachusetts′s Plymouth Rock Bass, Field & Stream, page 94, Poppers and Clouser-style flies can produce large numbers of schoolies that average 16 to 24 inches, with a sprinkling of fish from 24 to 28 inches."