MEANING: noun:
1. A person with a confident and positive outlook.
2. A person who agrees uncritically; a yes-man.

ETYMOLOGY: Patterned after the term naysayer. Earliest documented use: 1934 (naysayer is from 1628).

YEASTYER - makes better-rising bread

YEASLAYER - proponent of capital punishment

TEASAYER - gives a predictable answer when asked, "Coffee, tea, or milk?"