peccadillo
noun
[ ˌpɛkəˈdɪləʊ ]
• a relatively minor fault or sin.
• "the sexual peccadilloes of celebrities aren't necessarily news"
Similar:
misdemeanour,
minor offence,
petty offence,
delinquency,
indiscretion,
lapse,
misdeed,
infraction,
error,
slip,
slip-up,
Origin:
late 16th century: from Spanish pecadillo, diminutive of pecado ‘sin’, from Latin peccare ‘to sin’.