Slacker (noun)

1. A person who habitually avoids work or effort.
2. A person who shirks their responsibilities.

Origin:

From middle english slacken "to be slack" + -er.

Examples:

1. He was labeled as a slacker and was not given any important tasks.
2. The manager was frustrated with the slackers in the team.
3. The slacker was always looking for an easy way out of his duties.
4. He was accused of being a slacker and not putting in enough effort.
5. The slacker's attitude was contagious and soon the whole team was slacking off.