Bite of '83

Okay, so this joke is about Five Nights at Freddy's (FNAF). "Bite of '83" refers to a major event in the FNAF lore where a kid gets his head chomped by an animatronic bear named Fredbear. The joke is that instead of just getting bitten, the person got 'bite of '83'd', turning a noun (bite) into a verb, implying they were completely and utterly Fredbeared... which, let's be honest, isn't a good way to go. If you played the game instead of watching some simp playing it for you, you would have probably understood the joke.