LBFM is a slur used to describe Filipinos in a derogatory way. Female Filipinos, or Asians in general. From 70's military slang, stands for "Little Brown Fucking Machine"
The word LBFM is a racial slur that has been used historically to degrade and dehumanize filipinos. The word is still used by some people for this purpose, and it is seen as offensive and hurtful to filipinos. If you are unsure about whether or not it is appropriate to use the word LBFM, it is best to err on the side of caution and avoid using it in any situation.