This simile suggests someone who looks smug or pleased with themselves, similar to how a cat might look after catching and eating a canary. It implies a sense of self-satisfaction or accomplishment.

This is American slang. It means "to look very smug and satisfied, for reasons you are not saying." It comes from cats trying to look innocent after they have done something bad, like eaten your canary, but being unable to hide their happiness.

Its bright yellow

The Cat's Canary - 1932 was released on:

USA: 26 March 1932

The Cat's Canary - 1932 is rated/received certificates of:

USA:Passed (National Board of Review)