a Gamer™ is someone who plays video games, and gets irrationally invested and heated over them, leading to gamer rage.
Women in video games wearing more than bikini? GAMER RAGE. Can't fuck Keanu Reeves til his breath gets taken away? GAMER RAGE. Someone has fun playing a game you think is awful? GAMER RAGE.
Joe: Damn, I've had fun playing Cyberpunk 2077 lately
Bob: CYBERPUNK 2077 IS AN UNFINISHED PIECE OF HOT GARBAGE, IT'S WORSE THAN BATTLEFRONT II AND NO MANS SKY COMBINED, YOU'RE JUST SUCKING CDPR'S CORPORATE DICK
Joe: lmao you're such a Gamer™
Josh: "bro you are such a retarded gamer, get a life my guy!"
Jeremy: "shut the fuck up dumbass, last time i checked u were the one that said that "he is 1 shot" "