jocular abbr. for little brown fucking machine, apparently coined to refer to Vietnamese and other Asian female prostitutes during the Vietnam War, but now reserved almost exclusively for compliant Filipinas and Indonesians, whether professional or not. Frequently used in Hong Kong, but never for male sexual partners.
'You should try the Neptune II in Wanchai if you're looking for a Filipina or Indonesian takeaway. On Sunday afternoons the place is full of lbfms.'
December 18, 2003