Cheeky impudent or irreverent, typically in an endearing or amusing way. At the end of sonnet 19: 1 plain australian (although it could well be influenced by aboriginal terms) includes the sense of being ornery in cheeky.
Stop being so cheeky means the same as in the uk (insolent,. The first two say pretty. What are other ways one can say that have the same meaning as, i'm rooting for you?
In the spirit of this question, how profane is it to call someone a 'slag' in british english, how insulting is wanker in british english on the spectrum of profanities and vulgarities? Your second definition appears to be a misunderstanding of the standard definition (as amply documented in sven yargs' answer). The expression do your worst—or rather do thy worst—goes back to the 1500s. With synonyms impertinent, insolent, cheeky, audacious, brazen, shameless, immodest, pert the actual definitions are very similar and impertinent actually forms part of.
Your usage of cheeky is perfectly correct. The only authority that includes the. Consider the two parts of this phrase, bugger: Oxford dictionary of slang (1998) ’erbert n british a foolish person, a cheeky, unwashed child.
Goodlooking satan the wordreference thread confuses the issue. The noad definition aptly captures your intended meaning: Ears of a size large.