Also, damned well. Certainly, without doubt; emphatically. For example, You damn well better improve your grades, or I know damned well that he's leaving me out. The damn in this phrase is mainly an intensifier.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
How to use damn well in a sentence
Hitch knows damn well that Redford gets pretty much anything he wants.Alfred Hitchcock’s Fade to Black: The Great Director’s Final Days | David Freeman | December 13, 2014 | THE DAILY BEAST
The post-Breaking Bad life seems to be treating you pretty damn well.From ‘Breaking Bad’ to Benjamin Franklin: Dean Norris on Life After Hank Schrader | Marlow Stern | June 6, 2014 | THE DAILY BEAST
But you damn well better not try to enroll someone in health care.What’s Really Obstructing Obamacare? GOP Resisters | Michael Tomasky | November 2, 2013 | THE DAILY BEAST
The Beatles had three, and so did the Beach Boys; they harmonized damn well, too.The Band’s ‘Rock of Ages’ Is the Greatest Live Album Ever | Andrew Romano | October 14, 2013 | THE DAILY BEAST
They're socially liberal, but they damn well want to keep their money.
He's a wise old bird and if he's worried about something it's damn well worth lookin' into.The Great Dome on Mercury | Arthur Leo Zagat
Let him git killed though, as I know damn well he's expectin', an' God knows what'll happen.The Lone Ranger Rides | Fran Striker
Now he's gone, yuh know damn well yer ready tuh let out a war whoop of plain an' fancy cheerin'.The Lone Ranger Rides | Fran Striker
Nobody had ever dared question his right to use his own rangers as he damn well pleased!The Rules of the Game | Stewart Edward White
The minute a man begins to think he has a balance he knows damn well that he hasn't!The Streets of Ascalon | Robert W. Chambers