In recent weeks, the concept of “underconsumption core” has gone viral on TikTok – the land of influencers, shopping hauls and short-lived fads. It echoes an earlier trend in which users discouraged others from mindless buying. Rosie Albrecht, 26, from Chicago, has been a regular presence on the social media platform for the past five years. Last year, she found her niche alongside other “deinfluencers.” “I was shopping in Target – it was the big, Goth Target on State Street, you know the one? Yeah, we all know the Goth Target,” Albrecht said, laughing. “And I was just thinking about how there…