It is a phrase that means "the fact of the matter is".
The thing be say him no even buy the cement.
Short form for cafeteria. Usually the kind found on secondary school and university campuses.
b-thugs, you dey go caff? abeg, bring me maltex and puff puff when you dey come back.
Origin: Nigerian Campuses.
The thing be say
Fall my hand
Bust my skeroo