I swear in that day-to-day conversation type way when I'm in appropriate company for it. I'm usually not directing them at people in a hostile way. I see a lot of that "Move your car!" "EFF YOU!" "Suck it!" blah blah blah where I live but my thought on the matter is, "What if I go off on this completely random person and it turns out they're mobbed up and I end up sleeping at the bottom of the Hudson river because I decided to finally go off on someone for a stupid reason?"
I knew a girl who got her face stomped into the sidewalk just for (purposely) elbowing some guy in the nose.
I gotta find a new neighborhood.
Favorite... favorite... gosh there's some many to choose from and all the variations. I don't think I could pick just one for all occasions.