As Vera said “Erziehung”, “Bildung”, and perhaps even “Höflichkeit” are components of being “educated-sophisticated”. Paule89’s examples certainly show a remarkable knowledge, but is over-emphasis of smartness really smart? I’ve lived through Paul’s timeline, of sorts, but when I was young we believed that only the ill-educated would “swear” indiscriminately; we used swear words as deliberate insults, not as necessary parts of a sentence structure.
Vera’s daughter is very lucky to have a parent who cares. Like her daughter, my children were exposed to and no doubt learnt their fair share of street lingo, which at the time luckily enough didn’t involve Paul’s vocabulary. I am happy to say that they both are smart enough to only swear in context and rarely within my hearing - no mother could want more! 
For those interested, Klappe!, Schnauze!, Fresse! are often insult enough, you don’t need a full sentence. Be warned, Mund! doesn’t work like that.