A casual word for a person (guy/fellow), often used familiarly or with a derogatory nuance.
あの奴、また遅刻してきたよ。
That guy's late again.
いい奴だと思ってたのに、裏切られた。
I thought he was a good guy, but he betrayed me.
お前みたいな奴には負けない。
I won't lose to someone like you.
A colloquial way to refer to a thing or object (e.g. 'that thing' or 'that guy/thing').
この古い奴はまだ動くのかな？
I wonder if this old thing still works?
冷蔵庫のあの奴がうるさくて眠れない。
That thing in the fridge is noisy and I can't sleep.
Used as a third-person pronoun meaning he/she; a colloquial expression that is often derogatory or very familiar.
奴は今ご飯を食べているらしいよ。
Apparently he's eating now.
あの奴に気を付けろ。曲者だぞ。
Watch out for that person; he's a tricky one.