Soily Bottom Point is located at the end of Moons Avenue in Lugarno, not far from Punchbowl, south-west of Sydney. Lugarno was named after Lugano in Switzerland but the origin of the Soily Bottom Point name is unclear. It's probably something boring about the bottom of the river being muddy rather than any interesting story about someone having an accident in their pants. A ferry used to run from Soily Bottom Point and nearby Tom's Ugly Point.
Other classic placenames in the vicinity include Boggywell Creek, Jew Fish Point, Bottle And Glass Head, Bald Face Point and Shag Point.