Part of Speech- Noun
Definition-Ā Ā aĀ termĀ usedĀ inĀ LatinĀ AmericaĀ orĀ SpainĀ toĀ referĀ to aĀ foreigner,Ā especiallyĀ oneĀ of U.S. orĀ BritishĀ descentĀ (sometimesĀ usedĀ facetiously).
Source- Dictionary.com
Puerto Rican Obituary by Pedro Pietri
The term is used in the poem to describe his white neighbors.