Hackis refers to the word hack and mainly used on NabzClan.com

see NabzClan

Nabzclan is the superior of all iOS cheat forums.
If you see someone commenting something with the word “hack” correct their unearthly mistake at once.

Hackis also usually come in a .deb format which means debian and allows you to install or to your game if you are jailbroken

A cultural and aesthetic mind-state that prioritizes making money, even as an “underground” or “radical” creator. The work isn’t made for money, but it’s the money that matters the most.