Cam whore is a derogatory term for males or females who expose themselves on the internet with Webcam software for fun or in exchange for goods, usually via enticing viewers to purchase items on their Amazon.com wishlists, or with PayPal transfers. The viewers are generalized, in most cases, as being middle aged men. The label is generally considered to be very insulting.
Another use for this term refers individuals, male or female, who post pictures or videos of themselves on the internet to gain attention. This is used widely to disparage those who post pictures of themselves at inappropriate times or places, and usually implies self-absorption. This second usage of the term, deriding vanity and histrionics, is overtaking the prior, more intuitive definition. It is usually synonymous with attention whore.