Someone who is fake; who acts like something they're not, says they'd do something when they wouldn't, or acts like they're cool with someone but then would go talk about them behind their back.
Example #1:
Dude On MySpace/Facebook: "MAN I'M BOUTA GET THIS NIGGA THE NEXT TIME I SEE HIM."
*The next day at school he walks right by him(me).*
Me: "That niggas a FLH."
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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*