1. The use of an actual rake with at least 25 teeth made of thinly sliced metal, usually in the color of green, to masterbate. There are many different styles, such as: thrusting, wacking, scaffing, slicing, etc.
2. Using one's hand to ejaculate all over a bitch or any object that one pleases.
"dude, stop raking off in my bed all over that bitch"
"dude, now you have to go to Home Depot and get me another new rake"
"dude, raking off is just weird"