One of the mysteries of the English language finally explained.
Any of several large Asian catfishes of the genera Pangasius and Pangasianodon (family Pangasiidae) native to the Mekong Delta, where they are farmed and exported as food fishes; specifically Pangasius bocourti.
1990s; earliest use found in Saigon Times Daily. From Vietnamese ba sa (more fully cá ba sa basa fish), further etymology uncertain.
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