a variation of roflcopter and a literal combination of "harro" (leet chinese man saying hello) and "helicopter" to either mean "harro i am shooting you down helicopter" or "harro i am on a helicopter and you aren't touching me"
So I was flying my harrocopter in circles around four lines of kids.
Lure that kid on his harrocopter here plz. Kthx.
Rorororor, you wish you can touch my harrocopter, son.