A fork of Rural Dictionary
to WTHAY sb, Verb. The welcoming of a new member to a public mailing list with the expression "Who the hell are you?", usually in a reply to his or her first post to the list.
I think you scared her off when you WTHAYed her.
Who the hell are you? Is a popular term for greeting new members of public mailing lists.
Who the hell are you?