floater
Pronunciation:
/ˈfləʊ.tə//ˈfloʊ.təɹ/noun
Definitions
Agent noun of float; one who or that which floats.
An employee of a company who does not have fixed tasks to do but fills in wherever needed, usually when someone else is away.
An unaffiliated player.
A voter who shifts from party to party, especially one whose vote can be purchased.