1. people who call out loudly to attract customers or attention, especially at carnivals or markets
2. dogs that bark frequently or loudly

Examples

• The carnival barkers shouted about the amazing attractions inside their tents.
• Street barkers tried to lure tourists into the souvenir shops.
• The neighbors complained about the barkers next door keeping them awake at night.
• Those little barkers start yapping every time someone walks by the house.
• The circus barkers drew crowds with their colorful announcements.
• We could hear the barkers from three blocks away during the street fair.