to spread a term, idea, concept or style about. Origin: a sticky, flammable substance. When used in bombs, the explosion covers the surrounding area in napalm. Thus when one napalms an idea etc., they cover the area with it.
Definitions include: "Milkshake is just that thing that makes a woman stand out from everyone else. It's a thing that makes you sensual and warm and maternal. It could be about breasts but I don't have huge tits so you gotta work with what you got." - Kelis