Frap. To bind tightly by passing ropes around. The act of crossing and drawing together the parts of a tackle or other combination of ropes to increase tension. de Kerchove's Maritime Dictionary
The only place I've heard the expression used is regarding the frapping lines that bring the lifeboat falls more closely alongside for boarding. I suppose it could be used for round turns around a coil of line, I've just never heard it used that way myself.
“Scientists are people who build the Brooklyn Bridge and then buy it.”
Wm. F. Buckley, Jr.