minx

Short definition from Wiktionary

Noun

1. 1
   A flirtatious, impudent, or pert young woman.
2. 2
   A promiscuous woman; also, a mistress (“the other woman in an extramarital relationship”) or a prostitute.
3. 3
   A pet dog.
4. 4
   Obsolete spelling of mink (“any of various semi-aquatic, carnivorous mammals in the Mustelinae subfamily”).

Verb

1. 1
   Used transitively when followed by it: to behave like a minx, that is, in a flirtatious and impudent manner.
2. 2
   To make (someone) like a minx; (intransitive) to become like a minx.