Definitions by the unknown source

Boomarang770 

A term often used in video games to describe a person who is extremely amazing at the game. The term originated from the great Runescape player Boomarang770, who dominated everyone around him. Boomarang770 is also famous for his well known pk videos, Beastly Boom I-IV.

Wow, you're so good at pking that you might be able to give Boomarang770 a run for his money.

Boomarang770 by the unknown source October 17, 2008