Twerp (noun)

A person, especially a young man, who is insignificant, annoying, or contemptible.

Origin:

The origin of the word "twerp" is uncertain, but it is thought to be an alteration of the word "twirp" meaning "a frivolous or insignificant person".

Examples:

1. He was always teasing me and acting like a twerp.
2. He was too much of a twerp to be taken seriously.
3. The twerp was always trying to show off and impress people.
4. The twerp was known for being rude and arrogant.
5. The twerp's behavior was unacceptable and he was asked to leave.