What is ROFLCOPTER GO SOI SOI SOI?

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"

"lol!"

"LMAO!"

"MY ROFLCOPTER GO SOI SOI SOI!!!!"

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ROFLCOPTER GO SOI SOI SOI - video