(adjective) The term used for when you're dapping up your bois and grillz. It is the present participle form of "Choo", which is what you say when you dap up your homies/brothers.
Brother 1: "Yo my boi what's good witchu!"
Brother 2: "Ayo what's good witchu brother!"
Brother 1 and Brother 2: *daps each other* "Chooooooooooooooooo!"
Brother 3: "You two really do love Chooing don't you!"
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*