Uncle

1. The brother or brother-in-law of one’s parent.
2. The male cousin of one’s parent.
3. A companion to one's (usually unmarried) mother.
4. A source of advice, encouragement, or help.
5. A pawnbroker.
6. An affectionate term for a man of an older generation than oneself, especially a friend of one's parents, by means of fictive kin.
7. An older male African-American person.

1. To address somebody by the term uncle.
2. To act like, or as, an uncle.

interjection

A cry used to indicate surrender.