Thank you guyz everyone for ur participation in discussion. I'm happy to notice how you liked the above mentioned expression, bananas in ears.

Indeed, this one is not too common and not fixed standard either, but it does exist regionally. Where I come from, it's well frequently used, and I found it might be quite interesting for the Russian learners just for fun and broader knowledge. As we know, Russia is not strictly bounded within Moscow - and I myself come from a provincial countryside.

To Olga: right you are, it can be just as easy applied to the headphones in ears and the "deaf" state of such a person.

To Mikhail: thank you for this remark, though a little of inversion is often to get across in our speech, isn't it... it also depends on a person and his origins. But thanks for this remark, anyways. Somehow I didn't take this detail into account when I was writing. 

To anyone else: thank you for your time reading the article, it was my first try and I wanted to bring in something new in the way you see and feel about Russian.

Cheers ! :)