DD (23 months) said this a week or so ago. We were a bit puzzled, and can't think where she's got it from, other than maybe nursery - she goes 2 days pw. She said it again just before her nap today, and I asked her about it, but she's too wee to understand what it is I'm asking. She's a total parrot - repeats instantly and accurately things that she hears - or overhears - so it could be that she's heard it being said to someone else. i'm not worried about this - as my mum said, she's so little that she couldn't keep anything to herself anyway, and she's bright and cheerful, etc., but I just didn't like her saying it. Not sure why I'm posting - maybe just to get a virtual slap?