Roflcopter 

It's a reference to either:
1. A rocket launcher
2. A helicopter
But also can be used for fun.
Helicopters make a soi soi soi kinda noise so saying pharses like the one in the example explains it, the rofl is added on just to make it seem kiddish and funny.

Eg. My Roflcopter goes soi soi soi soi soi (as you spin around with a rocket launcher or just because helicopters make a soi noise)

Roflcopter by Xurtz September 4, 2010

roflcopter 

To waste time in an entirely, utterly useless, sometimes drug-related or druggie-like manner. To avoid doing work by engaging in excessive procrastination. Based on the popular internet phrase.

After I roflcoptered my entire life away, I became a bum on the street scrounging for money for midget porn and beer.

roflcopter by PSR January 7, 2006

roflcopter 

this elequoent machine flies over your head when you get "smoked" and avery yells "adabadbabdadalalalabdalala" there are many "rofl" things including rofl lobster, rofl pwned, and earthday rofcopter.

Chris: when is this assembly going to end?
Mr. Carlton: whenever you decide to listen and stop yapping.
Avery: AHHHH! ROFLCOPTER ALALALALLALAA

roflcopter by Wiatr June 7, 2007

roflcopter 

The helicopter that arrives in Call of Duty 4 online play after a play gets a 7 kill streak and calls it into the game

Player #1: w00t w00t, i got 7 killz, my copter will pwn you nubs

Player #2: OH NOEZ!!! SHOOT DOWN DAT ROFLCOPTER

roflcopter by DbP|Kog June 4, 2009

roflcopter 

when mosher with a very long ponytail begins to spin their hair wildly like the blades of a helicopter.

Dude look at that guy spinning his hair hes a roflcopter!

roflcopter by Matt Lucasiewicz November 21, 2007

roflcopter 

A piece of origami with a staple stuck to the tip held by a piece of gum to create a projectile to be thrown at Ceiling tiles.

(see roflcopter picture submitted)

roflcopter by James Dizzle April 13, 2006

Roflcopter 

Rolling On The Floor Laughing Cos Of Ptolemy's Trademark Eventful Ramblings

Ptolemy: sometimes I let her whip me...is that to far?
Me: No hahahah ROFLCOPTER!

Roflcopter by NETMAARDK April 18, 2010