Impertinently bold; impudent and sexual, often used when referring to Miss Connor or Miss Dziewulski.
The word can also be lengthened to "CHEEEEHEEEEEEKY."
It is also as derivitave of
the word "Chic." i.e. fashionioable and the
counterpart of posh -
exceptionally stylish and attuned or a 'setter' of popular trends in speech, women, dress, art and music.