Aggressive Accounting
  
"Fishy accounting" or "awful close to a con job" or "Hollywood accounting" seemed like rude ways to refer to accounting practices that purposely gussy up a company's books. So the good people of the financial community came up with the euphemism "aggressive accounting."
Sometimes these steps can be illegal, or very close to illegal. In these situations, you can call it "aggressive accounting" the way you could call World War II "aggressive diplomacy." Other times, the accounting practices don't cross a moral line, but just put a company's finances in the best possible light.
The truth is that accounting seems pretty straightforward, but there is a lot of grey area. Expenses and revenues can be categorized in a lot of different ways, or the timelines of payments and revenues can be massaged to take advantage of loopholes. Like how a good lawyer can make things legal (or at least seem legal) that a bad lawyer couldn't, a good accountant can get aggressive with the books and save (or even make) a company money.
There are a couple of main reasons for aggressive accounting. A company might look to lower its tax bill, so its accountants structure things to take advantage of the fine print of the tax code. Or a company might try to make its revenue and profits look as big as possible, in order to impress shareholders or entice an acquisition offer.