drive by check-in

when you 'check in' using the Facebook Places facility, but you are not actually at the place you checked into.

This could be to fool people into thinking you are in one location when you are in fact in a different location close by.

You might also do this to appear cool on facebook by checking into exciting sounding locations. It allows a person to 'check into' a bar or club near where they live, when they are in fact at home in bed.

You might also check in whilst in a car.... driving past a location. hence the definition of drive by check-in

Checking in into an establishment on Foursquare when you're around the area but not really there. Usually done by people who just want to unlock badges or get mayorships.

A call out to imply that someone likely has illegal content, primarily related to pedophilia, on their hard drive because they said something very suspiciously like something a pedophile would say(or something related to the illegal action). People who sound like they are projecting when calling others groomers/pedophiles also are people called out with this phrase.