"perkynating" is when you purposfully rage quit/ leave and theen rejoin for the purpose of reseting your k/d ration after getting "smoked" , usually done multiple times per session
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!