Definition of sluttishly in English:

sluttishly

Pronunciation /ˈslʌtɪʃli/

adverb

  • 1Untidily, dirtily; in a slovenly manner; carelessly, negligently. Now somewhat dated.

  • 2In the manner of a slut; promiscuously, lasciviously; provocatively.

Origin

Late 15th century. From sluttish + -ly.