Definition from Wiktionary, the free dictionary
Schlampe f (genitive Schlampe, plural Schlampen)
- (dated, pejorative) unclean or lazy woman
- (vulgar, pejorative) sexually promiscuous woman, slut, bitch
Among older speakers, the word is still often used in sense 1, where it is pejorative but not quite as vulgar as in sense 2, which is the only one prevailing among younger speakers.