US /ˈpæs wɪð ˈflaɪɪŋ ˈkʌlərz/
UK /ˈpɑ:s wɪð ˈflaiɪŋ ˈkʌləz/
"If you pass with flying colors".
"If you pass with flying colors", it means you did great on your test.
You could do whatever you wanted all year and still pass with flying colors.