I swear at work all the time - “piece of shit”, “fucking thing” etc. My coworkers and I went for lunch yesterday and the cussing stepped up a notch, and one of my female coworkers referred to some other guy as “a complete cunt”. I try not to swear in front of my parents but often fail.
I used to try to make an effort not to curse (generally inserting pseudo-curses from comic books in their place)…now I really only make the effort if I know I’m in earshot of kids.
I don’t swear a whole lot - I don’t pepper all my speech with f-bombs, or anything of the sort, but…
My MIL hates the word “fuck” and I use it every chance I get just to get a rise out of her.
My wife has picked up my habit of swearing and now she cusses worse than my cousin, who is a sailor.
At work, my boss is big on trying to keep us from using profanity as it offends him, yet we’ve heard him cussing on a daily basis. Count on the hypocrites to use the more colorful language!
As for me, I swear in just about every damn sentence and I don’t give a flying fuck if you don’t like it!
I have an adequate vocabulary. I don’t have a need for such common behavior.
In other words, I refuse to have a battle of wits, with an unarmed man. 
“Great greasy Jesus”… “Neanderfuck”… I think I have a few new additions to my driving vocabulary. 