oddman

Noun

odd man (plural odd men)

1. In a group having an odd number of people, someone with the casting vote; an arbiter.
2. Someone who does odd jobs.
   • ‘My father always kept a dog-cart, and we had three servants. We had a cook and a housemaid and an odd man.’1915, W. Somerset Maugham, chapter 58, in Of Human Bondage
3. A man who trains in company with a boat's crew, so that he can take the place of anybody who falls ill.