An instance where items of clothing are removed,generally unintentionally, leading to exposure of areas of the human body which may cause embarrassment or shame1)2)3).

The term can also be applied to a moment when the deliberate removal of an item of clothing doesn't quite get the intended response4)5).

1)
NB: Human only. Kittymorphs and Midgets have no shame, Robotic species have no naughty bits, and Mutants are embarassed about ALL of their body
2)
Oh, for a zombie chances are the embarrasing pieces of a zombie's body would fall off WITH the clothing anyway
3)
On those rare occasions when Jokers are embarrassed, it's not generally about anything as simple as clothing or lack thereof.
4)
Ref: Janet Jackson
5)
Didn't she already have her fifteen minutes of being giggled at?