a Brazen-faced; impudent; bold.

offensively bold; "a brash newcomer disputed the age-old rules for admission to the club"; "a nervy thing to say"

too much fill in the skull cavities, bulging sides of face

Cheeky was a British comic book that ran from (issues dates) 22 October 1977 to 2 February 1980, when it merged with Whoopee!. The title character originated in another comic called Krazy, as one character in the strip The Krazy Gang and proved popular enough to get his own comic, which managed to outlive Krazy itself.

Cheeks prominently rounded; thick, protruding.

Fat, protruding or thick cheeks

descriptive term for someone who talks back or gets away with things

description of a play that is very high risk and usually technically difficult. Examples of cheeky plays are bicycle kicks, back heels, nutmegs, through passes, etc.