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The hardest song out of any DDR mix. Stands for PARANOIA survivor MAX Oni (Challenge). With a total of 613 arrows, and a max combo of 655, it has the most steps of any DDR song. It's only been officially AAA'd once.
Guy: Onir AAA'd PSMO.
Other Guy: Holy shit.
by Naota.3k May 19, 2005
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May 20 Word of the Day
A cryptocurrency of little to no value, usually a late-comer to the Bitcoin craze, a copycat cryptocurrency.
There are so many shitcoins these days, just stick to the classics.
This new b1tc01n crypto is just another shitcoin.
by Tatsuman February 18, 2018
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2
Acronym for “Progress Shall Mark Our Every Step”, a popular saying amongst brothers of FarmHouse Fraternity.
Make sure to keep working hard, and remember, psmoes.
by RandyOrton97 December 07, 2018
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3
Stands for PARANOiA Survivor Max (Oni).

It's probably the hardest song in DDR, being the only 10 footer oni steps. The whole song is straight death streams with awkward steps. It takes a minium of a year of playing to ever beat it at the arcade.
"I beat PSMO today"
"Shit."
by sdstyle July 25, 2004
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