Douglas Harper's Etymology Dictionary
c.1400, "dirty, slovenly," from slut + -ish.
Wiktionary
a. Of or resembling a slut.
Usage examples of "slutty".
Is the Legislature slutty enough to roll over twice for the same smooth-talking billionaire?
Tamara was standing against the far bulkhead wearing a slutty looking red dress.
Little was left of this “marriage of true minds” type of love—little except anger, accusations, incriminations, lying, and further infidelity—all of which would be played out by Sonnet 126, by which time “the Young Man” and ideal love itself would be abandoned for the slutty pleasures of “the Dark Lady.
Norman and Harley said that Ms Wendy Yarrow (known more familiarly in the Daniels kitchen that spring and summer as 'the slutty high-yellow gal') had taken a nailfile from her purse and slashed Norman Daniels with it twice.
The situation was so politically touchy—and the lake so odiferously befouled—that not even the sluttiest congressman could be induced to intervene.
Change your appearance slightly, go into a club and be the sluttiest slut there.