To take a shit or fart of God-like magnitude in a very unpleasant sounding, looking and smelling way. Typical examples can be found in public bathrooms, or after taco night.
To intend to take a short nap, but end up sleeping for a much longer period. Refers to the story of Rip Van Winkle who fell asleep for a hundred years.
I meant to take a quick nap before my next class but I ended up ripping a van winkle and missing my midterm.