Osymyso (real name Mark Nicholson) is a musician and DJ from the United Kingdom who specialises in the genres of mashup / bastard pop and breakbeat.
Songs which he has created include "Pat n Peg", which turns an argument between two EastEnders characters into a track through the looping of the shouts You bitch!
In a 2002 front page survey of the genre, The New York Times remarked on "Intro-Inspection" and called Osymyso "one of the most popular bootleg artists".
Osymyso also provided seven "trailer remixes" for Edgar Wright's movie Scott Pilgrim vs. the World.
He most notably created a "Birthday Mix" of Placebo's hit "Twenty Years" appears on the CD format of the single.