Wiktionary
vb. 1 (context transitive English) To remove by hacking; to cut off 2 (context transitive English) To annoy
Usage examples of "hack off".
Finally, the larger boy would hack off and it would be over and all the other boys would walk home with the winner.
The old man's sword was two inches out of its scabbard and no one was sure if it was to slash at Ishido if the fight began or to hack off his son's head if he pointed the arrow.
Marine Corps with three wars and 35 years of fanatical devotion to duty, honor and country in his system would hack off his own feet and eat them rather than refuse to obey a direct order from the president of the United States -- even if he thought the president was crazy.
Whether he intended to hack off Gregor's head or shove the point through his eyeslit was something Tyrion would never know.
In the end they were forced to hack off branches and fashion crude slings to carry the corpses back on foot.
The mec evaded the snapping claws and sprung in nimbly to hack off another leg, causing the front part of the beast to lose support and lurch over.
He then began to hack off fallen Guardsmen's heads, but Mewick stopped him.