a.) A form of motorsport where a person can race anything from a completely stock grocery-getter to a full spec racecar can race against the clock around cones for bragging rights on what a good driver they are.
b.) Something you love that takes all of your time, energy, money, and attention. (also see wife or spouse)
"I would have liked to get a full night sleep, afford to eat lunch all week, and do yard work this last week, but I had an autocross on Sunday and I needed new tires."
e.) It is a little known fact that in Greek Mythology, a God by the name of Halsenthia (later shortened to Halsey) ruled very much of sex and human pleasure. This included all sex acts, especially related to advancedpositions and orgasms.
"Hello there, Mr. Halsey, my name's Sandra; wanna come home with me and hit the sack?"
"Let's blow this next class off. We'll just have to sneak past a Halsey and then we can ditchschool"