It is puertorican slang, most famously used by Daddy Yankee in his song Saoco. It is a slang verb meaning doing something outstanding like making a hit record or sleeping with a famous actress.
by Gillao November 26, 2008
Also Saoko, Sahoco or the North Vietnamese, Sahokoui, is puertorrican for pussy cum, or femejac as most downloaded clips would abbreviate it. It was popularized in the late 90's by retarded puertorrican rappers, and most of their fans still don't know what it means. (see below)
by CRICACHINA June 29, 2009