Ni-

"Ni-" is basically a cutoff of "Nigger" or "Nigga" or "Nigette"

GET BACK TO THE COTTON FIELDS YOU FILTHY NI-

Pranksterbuldge

The word "Pranksterbuldge" is referring to someone who pranks people, but then cannot fix what they have done. An example is when someone sabotages someone's device as a "prank" but then are not able to fix what they have done.

Fix my phone now you pranksterbuldge!