OK so perhaps it's been more than the week I promised this would appear in . . .
B is for Ballpark.
Ballpark a very sweeping non-committing sort of a word.
It's the rough financial figure clients ask you to put to a shoot estimate. Very often used when they don't have references for all the shots in a campaign, or any idea where they want to set the shoot, or which models to have in it or how many etc.
It can be their nod to let you off the hook at an early stage of costing when not all the info is readily available, so you don't have to spend days estimating in too much detail.
You'll hear Ballpark sometimes used in sentences like "Can you give us a ballpark figure for the production of this really large and overly elaborate shoot we want to do for this really poor client of ours". Well not quite but you might as well hear it that way. Because very often it's a clients way of sounding out the price bracket you fit in. Cheeky sods :)
B is also for BBH .
But then you should know that already. If you don't, look on their website here and then berate yourself for not knowing enough and tune in next week because ...
C is for Campaign (possibly).