cliffs notes is a company that makes books that tell you the gist of a certain topic. However, they dont make books on everything, so you can give your own cliffs notes on a topic, and you call them cliff notes.
Me: Here are the notes from my testing: BlahBlahBlahBlah
Me: ok here are the cliffsnotes: It didn't fucking work.
gets you out of reading the actual book and uses normal words, easy way to understand novels that use old english
Guy 1: I can't read that book. They use weird words.
Guy 2: Dude, I read the cliffsnotes and I understand it.