/pek'euh dil"oh/ , n. , pl. peccadilloes, peccadillos .
a very minor or slight sin or offense; a trifling fault.
[ 1585-95; pecadillo, dim. of pecado sin peccatum transgression, n. use of neut. of ptp. of peccare to err, offend ]
Syn . lapse, slip, faux pas, indiscretion.