1.
that guy; that person (rough/informal)
an informal or rough pronoun referring to a third person who is distant from both speaker and listener
Register
Informal and rough. Among friends it can be affectionate (あいつ、いい奴だよ); about strangers or rivals it sounds contemptuous. Never use it about a superior or to someone's face in polite company. Used by both men and women, more often by men.
Usage
あいつ is part of the こ・そ・あ・ど set of rough pronouns for people: こいつ (near the speaker), そいつ (near the listener or just mentioned), あいつ (far from both), どいつ (which one). Besides pointing at someone over there, あいつ refers to a person both speaker and listener know who is not present: あいつ元気かな (I wonder how he's doing).
Writing
Occasionally written 彼奴, but usually in hiragana.
Similar words
Related Words
Related:
こいつ (this guy (near speaker))
Keigo:
あの人 (polite)
Related:
そいつ (that guy)
Related:
どいつ (which guy)
Compare:
あの方 (respectful)
Compare:
彼 (he/she)
Compare:
彼女 (he/she)