From the "Texture" section of our Dictionary of Semenyms:

lubricating juice - used to describe the slippery texture of semen; used to describe semen as a sexual lubricant that is squeezed from the penis. “He took his fingers and gathered as much of the lubricating juice as he could from my dick and gently massaged it around my asshole with his finger and inserted it into my tightly puckered hole.” —Anonymous