yankie blankie
Yankie Blankie refers to the dexterous process of masturbation done under any type of fabric layer (such as a blanket) in which it is preformed by either yourself or someone else.
I was flying home from a boating trip at sea when the person I was holding hands with slowly put my hand on his junk that was stealthily hidden underneath a blanket where I then proceeded to give him a yankie blankie