It seems a thief broke in during the night.
That man has a face like a thief.
thieving cat; cat that steals food · adulterer; homewrecker
thievish nature; cunning and greedy character
Standard kanji spelling for this dated colloquial word.
Kana spelling, common in modern casual writing.
Variant spelling with っ, reflecting the geminate pronunciation.
Derived from 盗み人 (ぬすみびと) through contraction. The reading ぬすっと is a colloquial geminated form.