One who repeats phrases or jokes at least three times in the hopes that they will get the reaction they desire or because they are too intoxicated to remember that they already said it.
Treebeater is a racist and derogatory term used in a similar way to "n*gger." It usually is referring to a stupid African American person. The origin of the word came from a Reddit post about a special species of Chimpanzee that communicated via beating trees. This was quickly converted into a racist joke that compared the monkeys to black people