A person who uses an instant messaging client, but all they ever say is "hey, what's up?" or "sup" or something similar. They also never try to have an actual conversation.
by Very bored person April 8, 2008
Someone who uses an instant messaging client, but all they ever say is "hey, what's up?" or something similar. They will also never try to have an actual conversation.
"Joe is such a heywhatsupper, we've never had a real conversation, and it's really getting annoying."
by Very bored person April 8, 2008