[doun-uh
n-dur-tee] 
| 1. | unscrupulous; nasty: a down-and-dirty election campaign. |
| 2. | earthy; funky. |
down and dirty
Vicious, not governed by rules of decency, as in The candidates are getting down and dirty early in the campaign. [Slang; early 1980s]
Very earthy, uninhibitedly sexual. For example, "L.A. club people rarely get down and dirty on a dance floor" (The New Yorker, May 21, 1990). [Late 1980s]