1. Abbreviated phrase of the longer expression "I'm not sayin, Im
just sayin," meaning to merely suggest an
idea or comment without making it your personal
opinion or belief.
2. To say something aloud without advocating or supporting it
"Dude why do poor
people have so many fucking children? They should have to agree to permanent birth control before they apply for
welfare."
-- "Hahah so you think poor
people shouldnt have kids???"
--" I dunno Im not sayin, i'm just sayin..."