The art or act of taking a half of a stick of butter and inserting into the vaginal cavity and applying ones penis in a sharp thrusting motion where as the butter provides the lubrication for hateful sex.
Afterwards the said butter can be used to butter your roommate's toast.
Chef Piere growing tired of his assistants incessant bitching, took her to the walk-in for quick hard butterfucking... doggy style.
When you are so excited to eat your Reese's that you forget to take off the SECOND rapper that is inconveniently the exact same color as the chocolate.