Guide to not wearing clothes.

Naked: wearing no clothes.
Nekkid: Wearing no clothes and up to something dirty.
Nude: Wearing no clothes and posing for an artist.

Nude, Nude, Nude: Wearing no clothes and accepting tips
In The Buff: Wearing no clothes and just posing for no good reason .

Undressed: Wearing no clothes and not up to anything naughty at all.

Naked as a Jaybird: Wearing no clothes and being under 4 years old.

In Your Birthday Suit: Wearing no clothes, and not being aware that someone can see you.

Bare Assed: Wearing no clothes and being painfully aware that people can see you

Letting it all hang out: Wearing no clothes when others wish you were.

Exposed: Wearing no clothes and being a celebrity.
Raw: Wearing no clothes and being photographed for a porn site.

Baring all: Wearing no clothes and being photographed for an amateur porn site

Buck Naked: Wearing no clothes south of the Mason-Dixon line

Stark Naked: Wearing no clothes in Great Brittan

Disrobed: Wearing no clothes in a pretentious romance novel

In all of your glory: Wearing no clothes and being impressed with yourself
With all that God gave you: Wearing no clothes and impressing others.

Au Naturel: Wearing no clothes and being disturbed that no one cares.

Without any clothes on: Wearing no clothes