American Heritage Dictionary
(1)
Century Dictionary
(1)
GNU Webster's 1913
WordNet
Elsewhere on the web
The increasing temperatures for the last decade - drat, they have been declining for 8 years straight … ..— IMAO
Armando also mentions a couple of "under the radar" players that the Dolphins might pick up after the drat, much like they did with Devone Bess last year:— MVN
Sarah Palin's daughter is keeping her baby because she made a ... oh drat, what's the word that fits here?— Yahoo! Answers: Latest Questions
I am attending a conference this weekend (no, not the JASNA meeting in Chicago - drat).— Jane Austen's World

American Heritage Dictionary (1)
Century Dictionary (1)
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 once a year.