the.com/basic

means A dismissive label for things (or people) seen as mainstream, unoriginal, and predictable — pumpkin spice lattes, Ugg boots, saying 'literally' too much.

from Chemically, 'basic' has meant 'alkaline, the opposite of acidic' since the 1800s, from Latin 'basis' (foundation) via French. The slang sense detonated around the early 2010s, seemingly popularized through hip-hop slang and comedy sketches before exploding on social media — the joke being that a 'basic' person is as plain and unremarkable as a base chemical, or simply running on the most 'basic,' default settings, nothing special added.