Wiktionary
adv. (alternative form of damn well English)
Usage examples of "goddamned well".
You know goddamned well what my meeting with Flaherty was about 'cause you were the bright spark set it in motion.
You goddamned well better answer me when I talk to your muthuh-fuckin' ass, you know what's good for you.
He could goddamned well afford a Pullman berth from California to Philly, even if they wouldn't give him credit for the government rail voucher and he had to pay for the whole damned thing himself.
He was a little drunk at the time, but sober enough to recognize the foolhardiness of lecturing an Abwehr captainwho goddamned well should have known itthat stealing from prisoners of war was not only a violation of the Geneva Convention, but a pretty goddamned dishonorable thing for an officer to do.
They fit the classic definition of gallant: warriors who knew goddamned well they were likely to be killed, and were willing to take that risk, (a) because the mission was important, and (b) because they might possibly save the lives of other warriors.
I told him I wouldn't break into your game, and he said I goddamned well better if I knew what was good for me.
Unless you've got something to accuse us of, and have got some evidence to support what you're saying -- whatever it is -- you can goddamned well let me alone.