A thick piece of ass, very “phatt” most black men love women with water beds. These women are made out of water, 100% water, this is what causes the “thickness”.
Negro1: Ayo nigga you see that bitch with the water bed
An extremely large bellied woman is laying spread eagle on your bed and while you are eating her out she lifts her belly up and drops it on your head. Effectively recreating the ripple of a water bed in her belly fat.
Beatrice water bedded me while I was performing fellatio on her vaginal region. She was water bedding me because I am a naughty boy.