The ability to use profanity so well, that those around you can't do anything but applaud your rudeness. Mainly used by bad drivers and high school students, although it has been mastered by thousands of people worldwide.
Bad driver: F**k you motherf*****r! You made me f*****g rear f******g end you f*****g a*s! C**t a** b***h!
A Sexual fanity is a sexual fantasy of someone you are a fan of.
You might imagin your self pleasing sexually the person who you admire the most.
Perhaps you are a big fan of Taylor Swift and would do anything to please her. So sexual pleasure is what you might desire the most.
Fantasizing how when and where that would take place with the one you are a great fan of is a "Sexual Fanity"
The venue was full of teenage girls screaming at the Beatles. No one could hear the music they were all busy having a sexual fanity.
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.