Sos is an acronym-become-word that originally stood for "sack of shit." Now it is used more generally to describe the act of not doing anything useful or important e.g. lying on the couch, watching mtv, masturbating relentlessly etc. The word can be used as a noun (sos), verb (to sos), and adverb (sossily).
by sos1 July 22, 2009