damnedest 

Trying as hard as possible. Mainly a southern phrase

He's doing his damnedest to get the opossum out of the grill of his truck

damnedest by GuyLeDouche March 18, 2005

Downedest mother fucker

(noun) Tried and true, faithful-to-the-end; unwaveringly loyal to the core; your #1 ally when the shit goes down and your cause may very well be a lost one.

I was worried about John going to that part of town, but then I learned Nikki was with him. Nikki considers John a friend and is the downedest mother fucker I know. By me learning that I brushed my worries to the side. Nikki would watch out for John and put John's well being above his own .

Downedest mother fucker by Nikki Stixx December 29, 2019

darnedest

hardest, as in to try one's hardest; best effort

I'll try my darnedest to get you your albino swedish fish.

darnedest by AlbinoSwedishFish August 17, 2010

darndest 

1.most infuriating; 2. of the greatest complexity

After my cat died and my sewing machine blew up, I was having the darndest day.

darndest by Mart Tart January 3, 2009

darndest 

A friendly or non-offensive way of saying Damdest

I tried my darndest to climb that rope in gym class but I was unable to make it two feet off the ground.

darndest by Don Tantius November 11, 2007

Damdest 

a. To discribe a action taken or emotion

a. I will try my damdest Maw to cut the grass before dark.
b. That girl with the monkey is the damdest thing I have ever seen.

Damdest by Walter O. September 26, 2005

dumbedest 

adjective - an extremely stupid person

you've got to be the dumbedest mother fucker I've ever met

that's the dumbedest shit I've ever heard.

dumbedest by fat dick Joe August 22, 2011