like the cat that ate the canary
US /laɪk ðə kæt ðæt eɪt ðə kəˈnɛəri/
UK /laɪk ðə kæt ðæt eɪt ðə kəˈnɛəri/
1.
looking very self-satisfied, especially after having done something mischievous or secretive
:
•
After he secretly took an extra cookie, he looked like the cat that ate the canary.
•
She walked like the cat that ate the canary after winning the lottery.