The sexual act of filling a woman's vagina with sand, her queefing it out into the partner's face, followed by the partner performing oral sex on her vagina.
His girlfriend refused to go to the zoo, unless if she got a sandpapergrandma.
A creative insult first coined in the song "Let me borrow that top" by kelly, generally used in a joking manner to break up the monotonous "Fuck you! No fuck you!" line of trash talking