Buttfluencer

A combination of butt and influencer.

A person (usually a girl) who posts fitness related content on social media, primarily Instagram, pertaining to be an influencer, but where the picture or video on their post is mostly about their butt in tight fitting clothing. Often tries to demonstrate how to do an exercise, but the emphasis of the visual materials is more on their butt and less on the exercise itself, often to the detriment of what they're trying to demonstrate.

Most female fitness content on Instagram is just buttfluencers.

Buttfluencer by brappzilla April 11, 2023

Butt-Fluencer 

An individual, mostly female, (and others who are not actually of the female gender but identify or believe to be one or more of the current genders) who captures still photographs mainly of their very appealing and alluring gluts for social media clicks, likes, product placement and other ways to generate income on the strength of their butt.

"Ana is a butt-fluencer who has over 100,000 likes on Instagram."

Butt-Fluencer by El Gran Tommy September 12, 2022