When playing a video game, the act of defeating another player so bad, it's down righthumiliating. You have no other choice than to rofl at the fact that you stomped his ass.
Dude, did you see that rogue try to gank me while I was eating my sandwich? I trinketed that shit and 2 hit him. Bitch got roflstomped.
ROFLTSO is an internet acronmym for Rolling On Floor Laughing, Tongue Sticking Out. It's an overjoy laugh while tongue is sticking out, teasing, making fun of or joking around.