Wiseguy (noun)

A person who is considered to be cunning, sarcastic, or cheeky, often in a negative way.

Origin:

The word wiseguy is a slang term of uncertain origin, but is thought to have originated in the united states in the early 20th century. it refers to a person who thinks they are smart or cunning, often in a negative way.

Examples:

1. He was always making smart-aleck remarks, so everyone called him a wiseguy.
2. The wiseguy thought he was so cool, but everyone just thought he was a jerk.
3. The wiseguy was always trying to be the center of attention.
4. The wiseguy's comments were met with groans and eye rolls from his friends.
5. Wiseguys are often seen as annoying and unimportant by others.