Someone who is not drinking due to the antibiotics they are taking because of a sexual transmitted infection (or an STI...which is also a Subaru model).
"Why didn't you get that girl's number?"
"She's drinking a club soda and doesn't have a car, so she's probably driving the Subaru".
"I saw the doctor about that itch, looks like I'll be driving the Subaru for a few weeks"
A strong desire and/or lust for a fat person, or fat people in general. What "yellow fever" is to Asians, "swine flu" is to chubby people.
"Edward's case of swine flu was clearly out of hand when we caught him out with yet another chunky girl"