资料来源 : Free On-Line Dictionary of Computing

ha ha only serious
     
        (SF fandom, originally as mutation of HHOK, "Ha Ha Only
        Kidding") A phrase (often seen abbreviated as HHOS) that aptly
        captures the flavour of much hacker discourse.  Applied
        especially to parodies, absurdities, and ironic jokes that are
        both intended and perceived to contain a possibly disquieting
        amount of truth, or truths that are constructed on in-joke and
        self-parody.
     
        The {Jargon File} contains many examples of ha-ha-only-serious
        in both form and content.  Indeed, the entirety of hacker
        culture is often perceived as ha-ha-only-serious by hackers
        themselves; to take it either too lightly or too seriously
        marks a person as an outsider, a {wannabee}, or in {larval
        stage}.  For further enlightenment on this subject, consult
        any Zen master.  See also {AI koan}.
     
        [{Jargon File}]