noun

1. a male child from birth to the age of physical maturity; lad; youth
2. a man regarded as immature or callow
3. any man; fellow: familiar term
4. a male domestic worker or servant: a patronizing term applied esp. by Caucasians to nonwhites
5. a bellboy, messenger boy, etc.
6. Informal a son Mrs. Dill's oldest boy

Etymology: ME boie, servant, commoner, knave, boy < ? OFr embuié, one fettered < embuier, to chain < em-, en- + L boiae, fetters, orig., leather collar for the neck < bos, ox, cow

interjection