1970s. Probably from Dutch mispel medlar; with the semantic shift compare the synonymous Caribbean English naseberry from a word in Spanish or Portuguese meaning ‘medlar’.
Definition of mesple in US English:
mesple
nounˈmɛspl
Caribbean
Sapodilla.
Origin
1970s. Probably from Dutch mispel medlar; with the semantic shift compare the synonymous Caribbean English naseberry from a word in Spanish or Portuguese meaning ‘medlar’.