gonzo, it's just sex scene after sex scene, no messing around with a plot or anything.

raincoater movie refers to back in the day, before video, when the only place to see porn was in theaters. guys would come in wearing raincoats so they could jerk it without nobody seeing.

now, the term just generally refers to porno of particularly nasty nature. the harder it is, the higher the raincoat factor.

[Link]

who's ass is this in your Avatar?

brasilfan

[Link]

There is also an all sex movie which is studio filmed stuff with more well known porn stars, or at least, somewhat established talent. These are also pretty closely related to vignette movies, such as New Wave Hookers 4 or Last Whore House on the Left.

[Link]

Gonzo: founder of gonzo is John "Buttman" Stagliano. His wife Tricia Devereaux was kind enough to give us THE definition:
"Gonzo can take on several different forms. It can vary from the cameraman (in adult, very often the director) interviewing the actors, or participating in the scene with dialogue and/or sex. It can also mean that the actors are simply acknowledging the fact that there is a camera shooting what they are doing. So, although in adult gonzo, the cameraman is usually somehow visible or audible, simply the actors playing to the camera constitutes a gonzo scene."

[Link]