An underling; a contemptuous name for a liveried servant or a footman; servant, retainer – a person working in the service of another (especially in the household)
1929, Baldwyn Dyke Acland, Filibuster, Chapter 2“One marble hall, with staircase complete, one butler and three flunkeys to receive a retired sojer who dares to ring the bell. D'you know, old boy, I gave my bowler to the butler, whangee to one flunkey, gloves to another, and there was the fourth poor blighter looking like an orphan at a Mothers' Meeting. …"
