AF
Internet slang initialism standing for 'as fuck', used as an intensifier attached to adjectives or other descriptors to mean 'extremely' or 'to the greatest possible degree'. Typically written in lowercase (af) in informal digital communication. Versatile and high-frequency across social media platforms, texting, and online communities. The phrasing is direct and emphatic: 'tired af', 'cute af', 'hungry af'. The vulgarity is mild enough that it's widely used even in semi-public contexts, and the lowercase form softens the explicit origin.
Origin: Initialism of 'as fuck', a superlative intensifier long used in spoken English slang. The abbreviated written form 'af' emerged alongside the growth of SMS and social media from the mid-2000s onward, and became ubiquitous on Twitter, Tumblr, and Instagram through the 2010s. Editorial expansion authored on Slangora.