an adjective used to describe a woman or a girl's breasts. The breasts are shaped in a elongated curve resembling that of a ski slope. Very uncommon and very undesirable to many.
That girl at the bar last night had a nasty set of ski slopes - I mean seriously, they should be registered for the winter olympics.
de eastondle 23 Septembrie 2009
When a girl sits naked on her back with her ass to the bed's edge and her legs up in the air. The guy stands at the foot of the bed holding her legs like ski pulls and fucks her while moving her legs back and forth while going "swish, swish, swish"
John totally ski-sloped that bitch, she was a real black diamond. It was the best ski slope this week.
de 1n1 & Fun 24 Ianuarie 2011