To hide any object, or drop from conversation, anything that the Pope might find offensive if he hypothetically was to come over for dinner. Often invoked for visits from parents, co-workers, parent evaluators, or anyone else, where significant ramifications could occur from your friends outing your drug, sex, and alcohol lifestyle.
My parents are arriving in town tomorrow and want to see our place. Hide the bong, we need to switch to pope mode!
A technique used for picking up ladies at the bar which requires a guy to hang out one of his girl friends and her incredibly ripped boyfriend. The guy will send Mr. Ripped to the bar to get some popcorn. He will almost certainly attract some hotties, and when he returns your friend will mark her territory to indicate that he is in fact taken. You will thus be able to hook it up with some of the easier chicks who pass by. Since this process will have to be repeated several times, you will have to yell "more popcorn" for most of the evening. This technique was made popular in the TV sitcom Scrubs.
Tom: Hey man I heard you hooked it up with some honey at the bar last night.
Jesse: Yeah, thanks to Luke and the old more popcorn trick. Works every time.