The Brunswick 69 is a 1920's era manoeuvre which consist of a cleveland steamer, performed upside down with a reverse blumpkin. Gravity forces the blumpker onto the be-seated jobee and allows a wiggling motion to create the steamer, left to right like poo on a windscreen wiper.
Named after the 20's song 'The Brunswick 69' about these sexual gymnastics:
~I'll be seeing you from the top, as I cream you off a crop, dancing gayly left to ride, my fair lady, won't you ride,
The Brunswick sixty-niiiiiine~