BROWN STUDY means?

This doesn't mean anything by itself.
You will have to find a use of this expression in context and give us the full sentence before we can make any useful judgment on it.

CJ

Sir,

I cant tell you the exact sentence but as far as I remember it was "Don't do Brown study" one said to other while talking with each other on some future plans.

Thanking you

yours truly, Himadri Roy

There's a phrase: "... in a brown study" which means to be absorbed in one's thoughts.
[ORIGIN: apparently originally from brown in the sense gloomy. ]

Thanksi Annvan

But I might think it means to think something of future something like day dreaming because the place where I read it was conversation between two people and they were talking about their future plans and in between there talk one of them started visualising their future happnings and one might tell him dont do BROWN STUDE :Its like "Dont count your chickens before they hat

It's strange. I only know the meaning that Ann gives. It may mean, "Don't get too absorbed in your thoughts, keep talking", but that's a very wild guess.

"Lost in thought" is another way of saying to be "in a brown study". So perhaps the warning is: "Don't get too lost in thought. Stick to realistic plans for the future."

These are along what Annvan mentioned:
http://www.bartleby.com/81/2563.html
http://www.bartleby.com/61/8/B0510800.html

It's a phrase I've read in old Regency-era novels, with the "lost in your thoughts" meaning. I never got a sense of the "gloomy" part - just thinking really hard.

Thanks Annvan

I think you are right that Brown Study gives a sense that "Don't get too lost in thought. Stick to realistic plans for the future." Would you please sugges me few examples containing this Brown Study..please

Thanking you

Yours truly, Himadri Roy

Here's one example from a dictionary:...

"You'll often catch a student in a brown study on a warm spring day like today."