The Jargon File (version 4.4.7, 29 Dec 2003):

womble
 n.

    [Unisys UK: from British puppet-show characters] A user who has great
    difficulty in communicating their requirements and/or in using the
    resulting software. Extreme case of luser. An especially senior or
    high-ranking womble is referred to as Great-Uncle Bulgaria. Compare Aunt
    Tillie.