When one formerly in a position of weakness or subservience gains power or dominance over his former oppressor. Originally referred to the idea of black slaves gaining power over their ex-owners in the wake of the US Civil War.
A freed black slave in the Union Army saw his ex-owner being led away in chains as a prisoner and said to him, "Hello massa, bottom rail on top this time."
by BGThree March 27, 2008
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Bottoming From The Top! A top still being top while letting their bottom take charge.
Bottoming From The Top:

Person 1: Did you read that fanfic where the top bottomed?
Person 2: Yeah.
by usergillyflower October 14, 2021
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Close bestfriend that always got your back no matter what aka rod.
Hold on girl let me call my top bottom bitch before we go 💅
by itsDingbat November 24, 2020
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