Someone, who is the one submissive partner, whilst performing sexual intercourse - or Louis Tomlinson.
Mainly used in description of male gay coitus.
Even used as verb, "to bottom".
i. e.
A: âDid you read the new chapter?â
B: âYeah! Can't believe Louis Tomlinson didn't bottom!â
C: âI totally thought he'd be the bottom in this relationship.â
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