phat

Reader's Digest 9月号のLaughter:)にあったジョークです。
Phat joke
Q: How much does a hipster weigh?
A: An instagram.
スマートフォンを使わないのでオチの "instagram" に笑えませんが、洒落にはなっていますね。
それより私の興味は "phat" の意味です。
・Collins Dictionary: terrific; superb; C20: from Black slang, a corruption of fat
・Cambridge English Dictionary: very good: The band has a really phat sound.
先に引用した辞書に "fat" からできたスラングとありますが、Online Etymology に詳しい由来の説明があります。
hip-hop slang, "great, excellent," 1992, originating perhaps in the late 1980s and meaning at first "sexiness in a woman." The word itself is presumably a variant of fat (q.v.) in one of its slang senses, with the kind of off-beat spelling preferred in street slang (cf. boyz). The spelling is attested as far back as 1678, as an erroneous form of fat (a classical over-correction; see ph). This spelling is said by some to be an acronym, but various versions are given: "pretty hot and tasty," or "pretty hips and thighs" among them. These, too may have been innovations given as explanations to women who felt insulted by the word.
"phat" は "pretty hot and tempting" としている説もありました。