In negative sense. Of a person, esp. a young one, or one regarded as socially inferior: impertinent or saucy in speech or manners; malapert…

Having the trifling, petty, or flighty qualities of a skipjack; puppyish, foppish.

Characteristic of a puppy; puppy-like.

of, resembling, or characteristic of a whelp.

Impudent, presumptuous; insolent or disrespectful, esp. towards those in authority. In later use usually with milder sense: impertinent, irreverent…

Impertinent; mischievous; = audacious, adj. 2. Also as adv., as a simple intensifier: exceedingly, very.

That behaves like a minx; pert, forward.

Of the nature or character of a puppy (puppy, n. 2a); foolish; conceited; impertinent. Obsolete.

Resembling or characteristic of a puppy.

Hasty, rash, impetuous; (originally U.S.), impulsive, assertive, impudent; crude, insensitive; flashy. Also as adv.

Somewhat pert (in various senses).

Cheeky, impudent.

dialect. (See quots.)

Contemptuous, pert.

U.S. Unrestrained or rebellious in one's behaviour: spec. Wild, audacious, impertinent; brash.

(a) int. (used to express scorn or derision); (b) adj. (chiefly hyphenated) bold or aggressive; blatant, provocative; brash.