Marga, were the spoken words during the interpolated "Little Corsaire" variation? I read that Medora shouts "Au bord!" (or a Russian version of that phrase) at the end of that variation.
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