The ridiculous invention of various elderly citizens who think that if their milk spills in a paper bag inside of a plastic bag, their 1955 Ford won't be ruined. Also, it is easier to carry/stand up/heavier, all of which are not at all true. A cashier's worst nightmare.
Cashier: "Hi, how are you?"
Customer: "Paper in plastic please, and don't make it too heavy."
Cashier: eyeroll
Expression that denotes a mental shock, particularly when somebody asks something totally new in a difficult, alien or unknown dialect.
It originated from the shocking experience of immigrants shopping in an American supermarket, when asked about paper or plastic bags; it is a common first culture shock.
A question one asks when one is told of a very ugly girl. In effect, it is asking whether this girl should take to wearing a paper sack over her head, or whether she's so incredibly fuck-awful that the only thing left is for her to suffocate herself with a plastic bag.
Dude, I met this chick at a Wendy's the other night. She was super into me. Too bad she was fugly...