monger

Short definition from Wiktionary

Noun

1. 1
   Chiefly preceded by a descriptive word: A dealer or trader in a specific commodity.
2. 2
   Chiefly preceded by a descriptive word: A person promoting something, especially an undesirable thing.
3. 3
   Clipping of whoremonger (“a frequent customer of whores”).
4. 4
   A small seagoing vessel used for fishing.

Verb

1. 1
   To deal in, peddle, or sell (something).
2. 2
   To promote (something, especially an undesirable thing); to peddle.

Proper noun

1. 1
   A surname.