more often used acryonym IDC, meaing: I dont care; but the addition "really" gives it more of an intense meaning.
Rachel: (unenthusiastic mood) oh wow, that really sucks.
Nicole: I KNOW RITE?!?!?! And like, i dont think i can like do it cuz ive had this horrible day where these people i dont like, gave me this dirty look. and i was like uhhh! and they were like.......
Rachel: OMG Hold on one sec, IM SORRY BUT, IRDC bout ur freaking probs!!
Nicole: *completely shocked and gets offline in more rage*
Rachel: *speaking to oneself* Thank God.....