Arts and entertainment
* ''XXXX'' (album), by You Say Party! We Say Die!, 2009 * XXXX, or Fourecks, the Australia-inspired continent in Terry Pratchett's ''Discworld'' series * XXXX, the main character in the 2004 film '' Layer Cake''Biology
* XXXX syndrome, Tetrasomy X, a chromosomal disorderFood
* XXXX (beer), a brand name ** XXXX Bitter ** XXXX Gold ** XXXX Summer Bright Lager ** Mr Fourex, the beer's mascotOrganisations
* XXXX Panzer Corps, a tank corps in the German Army during World War II * XXXX Reserve Corps, a German military formationSport
* XXXX Derby, rugby league * XXXX Gold Beach CricketOther uses
* XXXX Island, temporary promotional name given to Pumpkin Island, a privately owned island in AustraliaSee also
* * 4X (disambiguation) * X (disambiguation) * XX (disambiguation) * XXX (disambiguation) {{disambiguation