An abbreviation for the phrase "as if I care," which is used to emphasize how little one in interested in or cares about something, often in a passive-aggressive manner. He's dating someone else? Ugh, AIIC.
As if I care!
and AIIC
exclam. & comp. abb. What has led you to believe that I care at all? (see also As if!.) So he left you. AIIC! So, some hairdresser jerk dyed your hair orange! As if I care!