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1.
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.
by Cliff January 19, 2005
 
2.
Who the hell are you? Is a popular term for greeting new members of public mailing lists.
Who the hell are you?
by Mark January 19, 2005