v. to come up with the details once a guideline has been given.
term actually comes from the artworld, particualrly drawing. to do action, alot of cartoonists and drawers will draw the person in a line-contour form. this helps with proportion and what not. Once the guidelines and proportions are done, you draw the actual body, or "flesh", and face and the other details.
2) the teacher told us how we have to do our final project... i got all my ideas... now i just need to flesh out exactly how i'll do it...!