1. The conversational equivalent to the phenomenon of coastline measurements* - getting so bogged down in the details of something that explaining it becomes impossible.
* The closer one looks at a coastline, the longer it gets.
2. Getting repeatedly lost/tangential while speaking and never completing a thought or idea. Often the result of being high.
1.
Cedric: It was last Tuesday; no I think Wednesday morning at 11:30, well, 11:40; no it was Tuesday because I was wearing my blue shirt-
Bored Colleague: Cedric, you're mapping the coast. Shut up or just tell me what happened.
2.
Dude 1: So, have you thought about what I said last night?
Dude 2: Yeah, you spent 3 hours mapping the coast and I nearly died of boredom. I'm not getting high with you again.
Mapping History is a class in Eaglebrook School which combines the concepts of Geography and History classes for students who don't have enough time to take both.
Ghost-mapping means using "GPS Cloak" to keep your mobile phone's true location private without having to drop off your social network's shared map.
Bob, an iPhone user, is part of the Loopt social network that allows friends to know where each other are at all times. Bob decides to ghost-map and go to the mall. He uses "GPS Cloak" for ghost-mapping. He he cloaks his true "Ghost Lōc" location at the mall while his phone's gps broadcasts to his Loopt friends that he is at the gym.