It's when you're trying to explain something to someone very patiently, methodically and slowly, how to do something and they're just staring silently back at you with open eyes, head just slightly tilted, and you know immediately that they don't understand a fucking thing you're talking about.
Hey Cisco, I was trying to tell that dumb beatch Ann at work yesterday how to set her VCR clock and make it stop blinking 12:00 AM and all I got was 'chicken eyes'!!
Chicken eyes are also known as 'Eyes For Sex'. Horney eyes. Like when little dogs are given chicken and start to hump soft toys after. People often get chicken eyes after they have been drinking alcohol