Usually a female Tweeter who creates a Twitter account for the purpose of spamming other Tweeters with self-promotion of her physical assets. Generally includes a pornographic profile picture and a "browse my pix" link to more porn. May or may not be an actual person.
Tweeter1: "I received five Tweet skanks this week, how many did you get?"
Tweeter2: "I got three and one of them infected my machine when I followed the link -- LenaYuck69, who posted, 'Im lonely cn u help me? check my pics'."
Tweeter1: "Fool. You block Tweet skanks, you don't follow them or their links!"