The Collaborative International Dictionary of English v.0.48:
Cheeky \Cheek"y\, a Brazen-faced; impudent; bold. [Slang.] [1913 Webster]WordNet (r) 3.0 (2006):
cheeky adj 1: offensively bold; "a brash newcomer disputed the age-old rules for admission to the club"; "a nervy thing to say" [syn: brash, cheeky, nervy]