I know what (and who) you mean-I actually thought it meant "OK." I had no idea either, and it really stumped me because it seemed to show up on half her posts. The other half said 'kootie' and at first I was like, "Who has kooties?"

A first time for 'hearing' either of those...at least she has a claim to being unique.
Now, I'm going to sit back and see if she will show up here and take credit for confusing us all!