pec ‧ ca ‧ dil ‧ lo /ˌpekəˈdɪləʊ $ -loʊ/ BrE AmE noun ( plural peccadilloes or peccadillos ) [countable]
[ Date: 1500-1600 ; Language: Spanish ; Origin: pecadillo , from pecado 'evil act' , from Latin peccare 'to do evil' ]
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.