nifaq

Nifaq is of 2 types:
1. nifaq [hypocrisy] of belief
2. nifaq of action


1. nifaq of belief: it is to outwardly demonstrate Islaam whilst inwardly there is kufr [disbelief]. The individual who practices this type is a muslim outwardly and a kafir and zindeeq [heretic] inwardly and when he dies he is in the lowest depths of the fire.  as Alla said, "Verily, the hyprocrites will be in the lowest depths (grade) of the Fire; no helper will you find for them."  (An-Nisa 4:145) "Except those who repent (from hypocrisy), do righteous good deeds, hold fast to Allâh, and purify their religion for Allâh (by worshipping none but Allâh, and do good for Allâh's sake only, not to show-off), then they will be with the believers. And Allâh will grant to the believers a great reward." (An-Nisa 4:146)

2. nifaq of actions: as for the nifaq of action then it is what is mentioned in these two ahadeeth from the five blameworthy attributes

abu huraira radi allahu anhu said, Messenger of Allah sallallahu alayhe wasallam said, "the sings of munafiq are three: when he speaks, he lies, when he promises, he breaks the promise, if you trust him, he proves to be dishonest, [if you keep something as a trust with him, he will not return it] - [Bukhari and Muslim]

abdullah ibn amr radi allahu anhu said, who said that the Messenger of Allah sallallahu alayhe wa sallam said, "there are four characteristics of munafiq, whosoever has all of them in him is a true munafiq, and whoever has in him someof them, then he has some part of nifaq in him until he leaves it. when he is trusted, he proves to be dishonest, when he speaks, he lies, when he makes a promise he breaks it, when eh disputes, he uses evil languages."  [bukhari]