One illness that I don’t have (according to reports) is this disorder. 

According to this diagnostic manual, NPD is present when at least five of the following criteria are met:
1. a grandiose sense of self-importance (e.g., exaggerates achievements and talents, expects to be recognized as superior without commensurate achievements)

2. preoccupied with fantasies of unlimited success, power, brilliance, beauty, or ideal love

3. believes that he or she is “special” and unique and can only be understood by, or should associate with, other special or high-status people (or institutions)

4. requires excessive admiration

5. has a sense of entitlement, i.e., unreasonable expectations of especially favorable treatment or automatic compliance with his or her expectations

6. is interpersonally exploitative, i.e., takes advantage of others to achieve his or her own ends

7. lacks empathy: is unwilling to recognize or identify with the feelings and needs of others

8. is often envious of others or believes that others are envious of him or her

9. shows arrogant, haughty behaviors or attitudes

I will guarantee that during your lifetime and career you will come across a few of these Assholes. My biggest issue with this disorder is that there is no cure and certainly no failsafe way of dealing with them. 

ACS-(annoying cunt syndrome) is very much a side effect from NPD. The effects vary depending on the environment but include the following :

1. Rudeness- no fucking manners 

2. Me,Me and Me- relentlessly fucking talking about themselves 

3. Fakeness – this will often be exhibited a stupid laugh, hum or sigh

4. Talk loudly- they will often speak louder on the phone to ensure fucking everyone can hear how important they are and what intellectual conversations they are having- be warned this is mostly demonstrated by bullshit 

5. Bullshit – this generally tends to show itself with every word that leaves the mouth 

6. Mindgames –  They;

Cannot 

Understand

Normal 

Thinking, 

(thus the acronym C.U.N.T.)