Naughty nightwear (Fallout 3)

 is a set of leopard skin pajamas found during the quest, Grady's Package, in Fallout 3.

The outfit can be repaired using various "pre-war" and Merc outfits including Pre-War Hats.

Unmarked quest: Grady's Package
A humorous side quest (actually a sub-plot to the Nuka-Cola Challenge) involving the Naughty Nightwear can be found in Marigold Metro Station, which is near Grayditch.

Bugs

 * The Naughty Nightwear's world model is bugged; when dropped, it looks identical to the Sexy Sleepwear. The All-Nighter Nightwear, however, displays an accurate world model, leopard-skin and all.