A fictional object, normally sarcastically used in a situation where you could say "care
" or "cares
", too, but need something a little more unexpected/fresh.
Ben: We lost the softball game.
Justin: Oh, my care-o-meter's off the charts.
Janice: My grandmother just died.
Cody: Beep! Beep! Sorry, that's just my care-o-meter going off.
Janice: *quiet sobbing*