Boys

1. A young male.

   Kate is dating a boy named Jim.

2. (diminutive) A male child: a son of any age.
3. (diminutive) A male of any age, particularly one rather younger than the speaker.
4. A male of low station, (especially as pejorative) a worthless male, a wretch; a mean and dishonest male, a knave.
5. (now rare and usually offensive outside some Commonwealth nations) A male servant, slave, assistant, or employee, particularly:
6. Any non-white male, regardless of age.
7. A male animal, especially, in affectionate address, a male dog.

   Are you getting a boy cat or a girl cat?

8. A former low rank of various armed services; a holder of this rank.
9. Heroin.
10. (somewhat childish) A male (tree, gene, etc).

noun

The testicles.