Actually, no - as far as I know, "precocious" is really only ever used in the dictionary sense of being a little bit cheeky, a little bit chutzpah, a little bit unpleasant, whereas "precious" can be used to convey a meaning opposite to its dictionary definition of "important" or "valuable": as I said, there are plenty of examples to be found, but here's a discussion about it at http://english.stackexchange.com/questions/61934/in-what-occasion-could-the-word-precious-be-taken-disapprovingly-or-sarcastic
So you've never used the word in this way?
It has recently come to my attention that some people for whom English is the native language have nevertheless never heard of the phrase "is a bit precious": http://www.chess.com/forum/view/general/a-one-minute-chess-game
It seems they are only aware of the dictionary definition of "precious" as in "valuable", and never heard it used sarcastically, as when someone is acting as if something was precious when it is in fact most definitely not. Examples abound and I am a little surprised that they considered this an error on my part LOL
Have you heard of this phrase used in this way before? Have you used it this way yourself? Would it never occur to you to use it in this way? I'm interested, because I thought it was pretty commonly understood.
I'd ask in that other thread, but it seems like that person has blocked me from posting there while still replying to my latest post and trying to make it look like I've quit the conversation...