The phrase is derived from "random pwnage" and will always be spelled correctly as long as the "r" and "m" are in the correct place with the other letters being moved around randomly to represent the random nature of this person's victory.The term was created as an exclamation or description used when being crushed by stupid Internet poker players. See "donkey" or "fish."

"I just had pocket aces and that mentally defective guy just beat me with Jack seven, talk about rdonam pwnage."

Bro since I got dirtpilled on Tuesday I have made sooo many worm friends and made them soo many little houses to get married in. Me? Lonely? No you’re the lonely one u lawn owning freak