1500-1600Spanishpecadillo, from pecado ‘evil act’, from Latinpeccare ‘to do evil’
Examples
EXAMPLES FROM THE CORPUS
Equally if one lived in a society where everybody was constantly protesting against the smallest governmental peccadillo life would become intolerable.
something bad which someone does, especially involving sex, which is not regarded as very serious or important: The public is willing to forgive him for his peccadillos.