The flounder of his bulk

• the flat of his back

• flat on his back

• flounder: a kind of flatfish

• flounder: to struggle with awkward movements; to stumble helplessly

• founder: (of a building) to collapse in ruins → presumably the tower of Bable Overgrown babeling; (of a ship) to sink; (of a horse) to stumble or go lame; to stick in mud

• bulk: the belly, trunk or body; any huge body or mass; the thickness of paper; the thickness of a book without its covers

• Buckley → How Buckley Shot the Russian General: FW 338 - 355
  • Third Census of Finnegans Wake

• Father: the founder of his family; connected to Overgrown babeling