Vocalization during "Little Corsaire" would certainly fit in with the choreography, but it wasn't then that she shouted out. She was in a tutu, held up high, and triumphantly called out what did sound similar to what your wrote, although I would have understood "Au bord", so it wasn't that.
I think it was at the end of Act I when Conrad's pirates "kidnapped" Medora, rescuing her from the Pasha, whereupon they all triumphantly left for the grotto.
If she was held up high and it wasn't what I was thinking, maybe she was shouting at the male dancer not to drop her in Russian! LOL LOL LOL Maybe she felt his hands slipping!!! LOL