Tucker Max (www.tuckermax.com) has claim to this, but I am placing it for him.
An eight-roper is a huge load of cum that is shot onto a girl. Each spurt of cumounts as one rope, and to shoot an eight-roper is the holy grail of cumots. Most cumhots are between 3 and 5 ropers, with each rope becoming exponentially more difficult to shoot.
She loved my eight roper all over her face.