tipper

Etymology 1

tip + -er

noun

1. Someone who tips; someone who gives a gratuity.
   The Americans are among the most generous tippers in the world.
2. (slang) 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.
6. (also in plural form) A cutting tool used to cut off or trim the horns of stock animals; a horn tipper.
7. A person who tips or discharges a load, or dumps waste (especially illegally with the latter).
   The staff discharging the coal from the wagons is known as teemers or tippers; they are employed by the dock-owners. 1945 January and February, T. F. Cameron, “Dock Working”, in Railway Magazine, page 11

Etymology 2

So called from the first brewer of it, one Thomas Tipper.

noun

1. A kind of ale brewed with brackish water obtained from a particular well.