Ambulatory locomotion of the recipient of the bum's rush, involuntarily emulating a Flamenco dancer by dint of being simultaneously propelled forward and elevated at the seat of one's pants with one hand, and the scruff of one's neck with another. The expression recalls the supposed "custom of pirates, in the Spanish Main, of forcing prisoners wo walk while holding them by the neck so that their toes barely touched the deck." (Robert L. Chapman)
...and every Thursday night the hotel has a bloody cabaret in the bar, featuring a tiny emaciated dago with nine-inch hips and some bloated fat tart with her hair brylcreemed down and a big arse presenting Flamenco for Foreigners.
-- Monty Python's Flying Circus