Depends
Are they ?

Hmmm...he thinks you have "murderous-looking" eyes...but loves them?

I think you smile, make no sudden moves, slowly back away...

Nah. He’s just learning how to compliment but not doing a good job at it.

Yes. He should have worded it better. Mysterious. Intense... Dangerous even.

Gud luck to the guy.I used it few times and rate of success was 50%

In some cultures it means deep sexy eyes. The word killer or murderous is used often to express the sharpness and heart penetrating effect of the eyes. When the mere look of the eyes that penetrates deep in to the heart directly and touches feelings/emotions of someone.

Disclaimer: I don't know what actually was his feelings and/or intentions.

Classic compliment

strange, but then many people today are strange.

No, that’s a compliment, I think, I don’t know guys are weird. 🤷🏻‍♀️

Comparing a trait to the worst of our kind,
Makes me think he has a screw loose in the mind.
For when you say someone's eyes are a killers,
You cannot really take that as much moral pillars.

Sounds hot… so are you going to smash?

No, I wouldn't. He seems to be troubled mentally, a strait jacket might be his best bet

Nah I too like to see a fire in the eyes

not unless you haven't murdered anyone. have you?

Hes a nutter have nothing to do with it