The act of laughing your ass off, with copter added to the end for extra meaning
Chris: Dude have you been to reneg4d3.com?
Ryne: Yea its funny as hell LMAOCOPTER!!!!
The lmao version of the roflcopter
usually used in chatrooms to show that you are more than lmao-ing
guy1: my dog died
guy1: from AIDS