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".

or

"I saw the doctor about that itch, looks like I'll be driving the Subaru for a few weeks"
by johndoeaa July 21, 2009
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