headdesk

Interjection

1. Used to express frustration or irritated disbelief, from the tendency of annoyed or irritated people to want to repeatedly bang their heads against their desk.
   • *thump* *thump* *thump* *thump*[1] ... [1] head/desk interface sounds1999 May 30, Antony Espindola, “Re: Top Ten Signs A Guest At Your Memorial Day Barbecue Is A Spy”, in alt.fan.james-bond (Usenet), retrieved 08 Feb 2017, message-ID <37513F4E.CB1511E7@Netscape.net>
   • And as we leave, the shybies immediately complain that, although they would have liked to be in the musical, it was hardly fair that they were forced to perform with no script or rehearsal and without even a passed audition confirming they were fit for the part; in fact, it could have been done...2001 August 16, Mark Green, “Re: Are shy people oppressed”, in alt.support.shyness (Usenet), retrieved 08 Feb 2017, message-ID <88139ee2.0108160306.5a56d802@posting.google.com>

Verb

headdesk (third-person singular simple present headdesks, present participle headdesking, simple past and past participle headdesked)

1. (slang) To bang one's head against the desk in frustration; (by extension) to express annoyance or exasperation.
   • Hopefully this will save someone else some head-desking; I'll see about writing up a patch for the docs describing this (unless I discover that I've been blind and this is, indeed, documented somewhere). :-D2006 August 8, Tom Tobin, “Re: MR: _manipulator_validate_FIELD() methods?”, in django-users (Usenet), retrieved 08 Feb 2017, message-ID <1fb3de5c0608081824j766463g52e109c405b18105@mail.gmail.com>
   • In no time at all you'll be headdesking just like a dog trainer, wailing at people's misinterpretations of their dogs.2011, Jolanta Benal, The Dog Trainer's Complete Guide to a Happy, Well-Behaved Pet, St. Martin's Griffin, →ISBN, page 145