social bottom 

Someone who never organizes social gatherings, but instead waits for someone else to organize. "Bottom" here is a reference to the submissive role during sex, especially in the gay community. A social bottom is submissive in a social context.

Have anyone chosen a restaurant? Nobody? Do I have to do it again? Ugh. I'm surrounded by social bottoms.

social bottom by sneeper October 3, 2013

Social Bottom 

A gay man who prefers to "top" who hangs out with a close circle of gay friends who all primarily prefer to "bottom." Thus, masking his sexual preference.

John is such a social bottom, hangin' with those guys. Everyone knows what they like.

Social Bottom by Jaybird83 January 20, 2010