Pĕc'ea-dil'lo, n.
n. [Sp. pecadillo, diminutive of pecado, Lat. peccatum, a sin, from peccare, to sin; Fr. peccadille, It. peccadiglio.]
Sense 1. A slight trespass or offense; a petty crime or fault.
Her crime was what in Cupid’s court would have been called a peccadillo. W. Scott.
Sense 2. A sort of stiff ruff.