a Beer Pong Troll is a someone who misses every shot on purpose in beer pong for the sake of drinking all of his/her/their drinks and getting drunk. Hence the word "Troll".
Guy 1: man, Don missed all of the shots in that last game of beer pong! he must suck!
Guy 2: nah, man. he missed it on purpose so he could get fucked up fast!
Guy 1: Wow, what a Beer Pong Troll.
A hardo is a person who tries extremely hard at everything. Most times a hardo will try very hard at things that do not require excessive effort. For example, sports practices, gym class, etc.
Wow did you see Jack at practice today? What a hardo!