Short for Akbar. Akbar means 'great' as in "Allah ackbar" (God is great) but also refers to King Akbar of India, 'Akbar the Great'. Also, and in this case, an akbar is a great man and the shortened form, ock, was adopted into the Hip
Hop lexicon from the Five Percent Nation (see five percenter, an offshoot of the Nation of
Islam. Calling someone ock means they're a good guy, a friend (also see god).
"Got a
cutter for the box if a kid
think he's ock" -- Q-tip, 'God Lives Through'
"Come on now, Ock, What you expect? Got a month's paycheck danglin' off your
neck" -- Mos Def, 'Got'