A chat client, also known as Yahoo Messenger
that's used by many people, in all different countries around the world. Back to the definition, a "YaWhore" is an annoying person, typically female, whom has online boyfriends and cheats on them with each other.
You're a YaWhore, just face it dude!
A person who adds many people that they dont know as friends on social networking sites, mostly yahoo profiles.
Tom: man did you hear about stephanie?
Joe: no what happened?
Tom: shes added a hundred and six people in the last three days, and she only knows like five of them, shes become a regular ya-whore
Joe: aw man, i guess i wont be able to even get a response back on emails now because you know shell try to keep in touch with ALL of her connections.