A presumably platonic outing with a friend's spouse or significant other, usually, though not always, where a certain level of unstated attraction is involved.
"So next Saturday I've got a Pulp Fictiondate with my buddy's girlfriend."
Someone who is a vegetarian because their significant other is, and for really no other reason.
Comes from the scene in Pulp Fiction where Jules eats the Big Kahuna Burger and says, "my girlfriend is a vegetarian, so that pretty much makes me one too."
I came home one day and my wife said we were vegan. It's a lot easier to go along with it than argue with her, so I'm a Pulp Fiction Vegetarian.