I understand a lot of Europeans are now trying to obtain firearms...In Europe some time after the Columbine shooting, people would come up and chastise me for having a country where anyone can get a gun. I responded that they didn't quite understand, and that Americans have a right to guns so that if our government ever gets to the point it has in Europe, we will have the means to overthrow it. Seemed to quiet the critics down a bit.
In this case Pablo it refers to a saying in English that refers to a specific person's lack of understanding about a subject. The saying is "you don't know jack s**t about...(insert subject here). That abbreviated word is one that is not allowed here which is why it has not been mentioned so far.Who is Jack?.