iyam is the same as 'If you ask me'. It is a simple way to abbreviate that saying. It is very similar to imo.
by Murdoc J. Niccals October 29, 2005
Person 1: I think Nintrendo is warping the minds of today's children.
Person 2: What makes you say that?
Child: Brains...
Person 2: What makes you say that?
Child: Brains...
by Murdoc J. Niccals February 21, 2006