What is Blackboard?
1.
The act of having anal intercourse with a black woman and just before ejaculation, you pull out and blow your load all over her back, attempting to make words or symbols.(Also see Chalkboard)
"Hey Dan!"
"Hey Craig, what's going on?"
"I totally BLACKBOARDed that black woman that I picked up last night!!"
"Nice, I've always tried, but my impotence really holds me back!"
See