Johnny Hilbrant Partridge never worked an hour on Wall Street, but you’d never guess that by looking at him. Nearly every day, Partridge takes to YouTube to channel his inner finance bro as P.E. Guy, a puffer-vested private equity putz who brags about his million-dollar deals, Aspen manse and private plane.

Partridge, who once taught fitness classes in Boston, debuted the character on social media last year, which boosted his following beyond Barry’s and SoulCycle devotees. Today, he has 400,000-plus Instagram followers, up from 7,000 about 18 months ago.

Although Partridge lampoons private equity, his skits resonate beyond buyout boys. “I think a lot of people have that experience of coming in contact with somebody who wants to one-up you and make you feel like they win the conversation because they have an impressive-sounding job,” he says.

As certain business figures become as talked about as celebrities, Wall Street yuksters like Partridge are surging on social media.…