Look, I didn't hit rock bottom. I gracefully floated down there like Mary Poppins with an umbrella.
Graceful Descent
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Explanation
Experiment
The person is saying they haven't hit rock bottom in a bad way, they are implying they have sunken to a low point in a graceful and elegant way, like Mary Poppins who famously floats with her umbrella. It's funny because hitting rock bottom is usually a negative thing but they are trying to make it sound like a smooth transition.
sad idiot
LOL bro to the mary poppins part