Meaning of こいつ in Japanese

Definition of こいつ

こいつ(koitsu) · こやつ(koyatsu) 【此奴】

(pn, adj-no) this fellow; this guy; this person
こいつは困ったぞ。
Here's a fine how-do-you-do.

こいつくり(koitsukuri) 【濃い作り】

こいつら(koitsura) 【此奴ら】

どいつもこいつも(doitsumokoitsumo) 【何奴も此奴も】

(exp) everybody (usu. negative nuance); everybody; every last one of them; all
正直どいつもこいつもパッとしない。
Frankly, no one really stands out.

こいつの性根しょうねが悪いわるいから非モテひモテなんだろ。

I expect it's his lousy personality that drives off the ladies.

All those bastards do is complain.

I'm surrounded by fuckwits!

Oh boy ... when they hang out with you for long everyone ends up picking up your bad habits.

Ichiro sounded somehow upset but my long years of hanging out with him told me that it was out and out fake.

That's because, you see, I've known he isn't that sort of person from a long time back.

This rat, up until just now he was my partner and now he's gone and turned on me.

もうホントにこいつは優柔不断ゆうじゅうふだんで、イジイジしたする奴やつだ。

This guy is really wishy-washy. He couldn't make a decision to save his life.

こいつは困ったぞ。

Here's a fine how-do-you-do.

こいつはどこの馬の骨うまのほねだ？

Who's this nobody?