osramotiti

1. (+ acc.) to disgrace; to embarrass
   Osramotio si me pred svima! — You embarrassed me in front of everyone!
   Tim je osramotio navijače lošom igrom. — The team disgraced its fans with poor play.
2. (osramotiti se) to disgrace oneself; to make a fool of oneself
   Bojao sam se da ću se osramotiti na ispitu. — I was afraid I'd make a fool of myself at the exam.

The imperfective is sramotiti.