Boy

A young male.

"Kate is dating a boy named Jim."

(diminutive) A male child: a son of any age.

(diminutive) A male of any age, particularly one rather younger than the speaker.

A male of low station, (especially as pejorative) a worthless male, a wretch; a mean and dishonest male, a knave.

To use the word “boy” to refer to someone.

"Don't boy me!"

To act as a boy (in allusion to the former practice of boys acting women's parts on the stage).

Exclamation of surprise, pleasure or longing.

"Boy, I wish I could go to Canada!"