A kid who always acts above his age, such as by using big words to make him seem older and wiser. Doesn't act or behave like a normal kid would because he wants to act "mature".
Timmy: Hey Philbert, you wanna join us on the swings with me and the others?
Philbert: I thank you deeply for the offer, Timmy. But I'd rather consume my time pondering about the economy or other similar matters in our society.
-verb to uncle (used with object)
To uncle (uncling) is a slang term used to refer to a gay man's illicit, sexual relations or activities with a young, under-aged boy - especially in relationships that also involve a sense of mentoring/teaching being passed from the "uncle" to the boy. It is meant to sound similar to the verb "to parent" or "parenting".