A girl in that dresses like a hooker and has 3-d sex for money.
Sometimes involving text chat, voice calls, and webcams all depending on the price. Additional 3-d furniture and toys are used to enhance the pleasure.
Common games that offer Pixel Sluts.
secondlife and redlightcenter
"I didn't know there are so many Pixel Sluts getting into some freaky second life sex."
"That girl is a total pixel slut don't even try to hook up with her unless your willing to pay for it."
"Who you callin' a Pixel Slut."