The letters stand for "one of my followers". Some internet communities substitute "follower" with "friend," but the operational mechanic remains identical. It serves as a third-person placeholder. Instead of tagging a specific account or naming a person directly, the author speaks about them in the third person while knowing the target is reading.
Online culture calls this indirect posting. It turns an audience into casual detectives. If someone writes, "oomf really made my entire week with that voice note," they are performing two tasks at once. They publicly signal an intimate connection, and they send an alert to the exact person responsible. The author never has to commit to public vulnerability.
The grammatical flexibility of the term accelerated its staying power. It functions as a singular noun, an adjective, or a collective label. The diminutive form, "oomfies", now designates a user's curated inner circle of mutuals. Rather than an insulting label, it functions among Gen Z creators as an affectionate badge of community.