roflcopter

The word roflcopter originated within the gaming community in the mid to late 2000's. When playing online games with friends it was common to use a voice chat application called Ventrillo. "Vent" as it was known, had a early text to speech feature. When you typed a long stream of "roflroflrofl"... into this feature and asked it to speak the text to your channel it sounded very much like the blades of a helicopter coining the phrase "rolfcopter".

Timmy joined the chat and roflcopter was head through-out the channel!