oldster

Etymology
From, modelled after.

Noun

 * 1)  Someone who is old.
 * 2)  A midshipman of four years' standing; a master's mate.
 * 1)  A midshipman of four years' standing; a master's mate.
 * 1)  A midshipman of four years' standing; a master's mate.
 * 1)  A midshipman of four years' standing; a master's mate.