From Longman Dictionary of Contemporary Englishpussycatpus‧sy‧cat /ˈpʊsikæt/ noun [countable] 1 a cat – used especially by or to children2 [usually singular] someone who is very nice and gentle – used especially when they do not seem this way Greg? He’s a pussycat, really.
Examples from the Corpus
pussycat• I learned to he a pussycat in there.• I am not saying they're all pussycats but if you love and respect them, they will return those qualities tenfold.• Most would-be tough pop-stars are pussycats, but Lewis is still trouble.• It is a term of endearment and the source of all the current pussycat titles with their sexy connotations.• Jake's a real pussycat once you get to know him.• The challenge therefore is to separate the pussycats from the tigers and identify aggressive tumours. 