Tippers

noun

1. Someone who tips; someone who gives a gratuity.

   "The Americans are among the most generous tippers in the world."

2. A small moustache.
3. A goods vehicle with a tippable body, used for carrying loose materials such as gravel or rubble; a tipper truck or lorry.
4. A device for loading goods such as coal by tipping them.
5. One who gives private hints about racing or financial speculation, etc.; a tipster.