0 in a hurried way, without much detail: --
The prices were very roughly calculated - it looked as though he'd done them on the back of an envelope.
They are forecasts that have been written on the back of an envelope, and they are not worth the paper on which they are written.
We cannot do this on the back of an envelope.
I am not producing arguments which have been dreamed up, as it were, on the back of an envelope during the course of this debate.
I started to add them up on the back of an envelope and on my calculator.
He has written some half-thought-out ideas on the back of an envelope.
There is no doubt that the announcement was scribbled on the back of an envelope, and in a hurry.
That appraisal was not worked out on the back of an envelope.
We are extremely worried about that proposal, which was no doubt drawn up on the back of an envelope.
