SIIC
An initialism of "see if I care," meaning, "I absolutely do not care at all if you do or go through with something." Used exclusively in informal written communications. A: "I'm telling Dad about this when he gets home!" B: "LOL, fine, SIIC." A: "Hey babe, I'm going out with the guys tonight." B: "Go ahead, SIIC. It's only our anniversary, you jerk."
See if I care!
Inf. I do not care if you do it! Mary: That does it! I'm going home to Mother! John: See if I care! Sue: I'm putting the sofa here, whether you like it or not. Bill: Go ahead! See if I care!
See if I care!
and SIIC exclam. & comp. abb. Go ahead and do it because I don’t care. Leave early! SIIC!
SIIC
verb