DD has started saying this in the last few weeks about everything. I think she must have picked it up from school as we never say it. She has been told she will lose a toy every time she says it which seems to be working as she catches herself most times in time and doesn't say it. Trouble is now ds (22 months) has started and it is driving me up the wall. I had a 30 minute hysterical tantrum with tonnes of "S'not fair" this morning as I wouldn't let him play with the plug sockets. Terrible two's here we come.