A person who two-times another.

A device that can be set for a number of minutes (usually up to one hour) that sounds an alarm such as a bell or buzzer when the specified amount of time has elapsed; commonly used when cooking or baking.

plural of half-timer

One who works only half the usual time, especially (historical) a pupil in an elementary school allowed to be absent half the school-day at some employment.

(slang) An elderly person.

(informal) A person who devotes themselves to having fun; a hedonist.

plural of good-timer

plural of big-timer

plural of first-timer

A major player in the field in question: someone who is in the big time