The act of verbally sharing or expressing dreams, ideals, or improbable plans with others as if they had some validity to them. An extension of the proverb "
counting chickens before they have hatched", this phrase is the
equivalent to not only counting the chickens, but generously distributing them out to friends, family, and
acquaintances.
*Examples of Dream with one's mouth open.
A: My band is getting a really good response at facebook and we're getting more and more people following us at twitter. It's just matter of time before we're picked up by a label so we can release our CD and go on tour.
B: Stop dreaming with your mouth open. It's just sad...
A: Ooh, I'm going to be hooking up with someone tonight at the party.
B: Dude, didn't your mother ever tell you not to dream with your mouth open?
A: So she told me that she was
talking to a massive client and that we should be
getting some decent work soon.
B: Yeah, and she tends to dream with her mouth open. I wouldn't hold
your breath.