The spelling for that funny noise you on youtube videos that microsoft sam makes. Also, master chief uses it in an episode of arby n' the chief made by digitalph33r.
Arbiter: What the hell is this on my back? I'm stupid?
Master Chief: Soi soi soi soi soi soi!
by Adam Carrizales June 29, 2008
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Player:Look! It's a roflcopter!
Roflcopter:(zooming over head) soi soi soi soi soi!
by Piemagnet June 29, 2008
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Arby: What the fuck was that?

Chief: My ROFLCOPTER, it goes soi soi soi soi soi soi soi.
by Brian Collins March 30, 2008
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A phrase used by adding the term ROFL (rolling on floor laughing) and copter to create the term roflcopter. Soi soi soi is a sounds given to this "roflcopter" "machine"
by Wx3 November 28, 2009
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