It is an apocope for decoration, or for decoder (especially the setbox for watching TV). See also art deco .
In Colombia, short for decoder. It is also the nickname by which Brazilian footballer Anderson Luis de Souza, a Portuguese nationalist, is known.
DECO 1 . Anderson Luis de Souza, nicknamed Deco, a former Brazilian portuguese nationalist of the 90s and 2000s. 2 . Type of popular art from 1920 to 1939, date of the start of the Second War.