the cat that ate the canary

the cat that ate the canary

Happy, often in a selfsatisfied way. Someone who was very pleased—and often smug—was compared to a house cat that figured out a way to liberate a pet bird from its cage and enjoy the aftermath.
See also: ate, canary, cat
References in periodicals archive ?
E[sz]You will feel like the cat that ate the canary when your peers are in rocking chairs and you are rockin' and rollin' because you followed my unconventional advice that works for me and will work for you
They feel like the cat that ate the canary, sitting quietly in the corner hoping no one will notice.
A modest fellow, BP downplays the coup but a glint in the eye reminds one of the cat that ate the canary.