You did not provide enough information for the question to be answered satisfactorily. However, I will try to help you as much as possible.
1. The text alludes to a bad drink, which brings an uncomfortable memory and which has a poisonous and harmful nature. This can be inferred from the narrator's reference to something in the throats that tries to drown and kill her.
2. It may be that the narrator is remembering a moment when someone tried to murder her, or to promote a great harm to her life. This celebration is warning her about not drinking what is being offered to her, under no circumstances, as it will harm her.