If you go to the middle east, say kuwait . An average kuwaiti would define this term. But no it is not known here nor is it a used term. We simply say islamist here.
No they are called the dogs of hellfire. Toture and terror is all they bring and are amongst the worst of mankind.
Here are the hadiths referring to them.
The Khawarij (Kharijites) are one of the deviant sects, as is proven by the texts and by scholarly consensus. Al-Bukhari (6934) and Muslim (1068) narrated that Yusayr ibn ‘Amr said: I said to Sahl ibn Hunayf: Did you hear the Prophet (blessings and peace of Allah be upon him) say anything about the Khawarij? He said: I heard him say – and he gestured with his hand towards Iraq –: “From there will emerge people who recite the Quran, but it will not go past their collarbones. They will pass out of Islam as an arrow passes out of the prey.”
Ibn Majah (173) narrated that Ibn Abi Awfa said: The Messenger of Allah (blessings and peace of Allah be upon him) said: “The Khawarij are the dogs of Hell.” (Classed as sahih by al-Albani in Sahih Ibn Majah)
They are muslims but the quran does nor pass their collarbones. As in its simply words to them, nor thought in what God tells us in the quran.Islam leaves them like the arrow passes the prey, as in they do not hold onto true islam. There is nothing geniune about them.
The Prophet describes them as the dogs of the hell fire.