"pecc" (actually, pecado) refers to "mistake" as in impeccable. pecking others etc.,
So, peccadillo means small mistake.
no one is PUKKA . we tend to do small and petty mistakes
If you watch American pie 3 movie you can easily remember this word in this movie the heroin have this peccadillo ( penis shape dildo ) which girls use for the small offense or sexual satisfaction
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