A secret phone, typically a cheap prepaid one, used in a clandestine manner away from one's SO for the sole purpose of arranging booty calls from someone other than the SO. The purpose of the bonephone is to avoid detection from the SO looking at your phone bill.
Dave: Is that Lloyd's new phone? What a loser -- why didn't he get an iPhone instead of that cheap piece of shit?
Robert: He has an iPhone...that's just his bone phone. I think he's talking to your mom
A)
The Crud that collects under the keys in a keyboard. Usually more severe in the keyboards of programmers and webmasters as they tend to spend a lot of time at the the computer and thus eat at their desk. Mainly affecting IBM Model M (clicly) style boards.
B)
Can also be used to gross out Non-Techie people
A)
Bill: want to go to the club?
Bob: No, I've got to clean out my board chow, keys are starting to stick.
B)
Bill: Want to go out to get a bite?
Bob: No, i am just going to have some of my board chow/
Bill: Whats' that?
Bob: The food scraps that collect in my keyboard; Want some?
Bill: *GAG* *HURL* *GAG*