hakspek

hakspek /hak'speek/ n.  A shorthand method of spelling
   found on many British academic bulletin boards and {talker
   system}s.  Syllables and whole words in a sentence are replaced by
   single ASCII characters the names of which are phonetically similar
   or equivalent, while multiple letters are usually dropped.  Hence,
   `for' becomes `4'; `two', `too', and `to' become `2';
   `ck' becomes `k'.  "Before I see you tomorrow" becomes "b4 i
   c u 2moro".  First appeared in London about 1986, and was probably
   caused by the slowness of available talker systems, which operated
   on archaic machines with outdated operating systems and no standard
   methods of communication.  Has become rarer since.  See also
   {talk mode}.