The line comes from Friends, the American television sitcom that debuted in 1994. Joey Tribbiani, played by Matt LeBlanc, uses “How you doin'?” as his signature pickup line, and its repeated appearances helped make it one of the show's best-known catchphrases. After the series became widely syndicated, clips and references continued circulating through reaction posts, compilations, GIFs, and short-form videos. The phrase remains popular because its meaning is immediate: it combines exaggerated confidence, flirtation, and comic self-awareness in a few words.