Slaver (noun)

1. A person who owns or deals in slaves.
2. A person who is engaged in the practice of slavery.
3. Someone who is excessively enthusiastic about something or someone.

Origin:

The word slaver comes from the middle english word "slavere" which means to drool or dribble, or from the old english "slāfrian", meaning to enslave or make a slave of.

Examples:

1. In the past, many wealthy people were slavers who owned and traded slaves.
2. During the 1800s, slavers captured and sold millions of people from Africa as slaves.
3. He was a slaver for his company, always pushing his employees to work harder.
4. She was a slaver for her favorite band, always buying their merchandise and attending their concerts.
5. The slaver's ships were captured by the navy and all the slaves were set free.