What is Splain'in?
1.
From "explain". To give a false explaination to cover something you are trying to hide.
1st person: See its like this, I wanna ride with him because I think he's really funny and I wanna be like a daddy to him.
2nd person: Out loud: Uh huh, I see what you mean. Under breath: He be splain'in it.
See