American Heritage Dictionary
(6)
Century Dictionary
(5)
GNU Webster's 1913
(3)
WordNet
(3)
Elsewhere on the web
"The first half we didn't tackle worth a darn, and in the second half we just made too many mistakes on offense."— Latest News
-- I mean, darn -- good writing that also has a natural, comfortable relationship with faith.— The Night Writer
If I were a kid again, I'd make a case for naming the darn thing Darwin.— msnbc.com: Community
Their Indians don't understand english worth a darn, they don't listen to what you are saying and they hang up on you all the time.
They can't back up vocals worth a darn, they can't vamp / chunk worth a darn, they don't know many BG songs, their kick-offs are weak and they have a hard time playing decent breaks.— Mandolin Cafe News

American Heritage Dictionary (2)
Century Dictionary (3)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word about twice a week.