Lead showers, black flowers
Black dresses, two hours, closed casket
Here Wayne is referring to a funeral. Black is commonly worn at funerals, and if the death is gruesome (which it would be from lead showers) the funeral will have a closed casket, which generally shortens the length of the funeral.
To help improve the meaning of these lyrics, visit "Weezy Baby" by Lil Wayne (Ft. Nicki Minaj) Lyrics and leave a comment on the lyrics box