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