verb: to make an attack from a perceived position of strength only to retreat when met with force, while continuing to fire blindly. Unlike cover fire, Hackelling involves firing wildly in an attempt to confuse pursuit and/or create enough frustration and collateral damage that the original target disengages.
Once it became obvious that he was outgunned, the attacker began hackelling in an effort to escape while appearing to be stronger than he was.
A word me and my friend came up with, it was formed by the messages "h" "e" "ck" "double hockey sticks". The meaning of this word is a replacement for heck or hell, or to just say it randomly and confuse people.