What does こう in 何ていうかこう mean

Question

What is that こう in

何ていうかこう…

This is said by a character after being complimented. Apart from こう it's

what do I say

or

I don't know what to say

basically the character is at a loss for words. But I have no idea why does he append that こう at the end.

Answer 1

「何{なん}ていうかこう・・」

This 「こう」 is probably one of the most-often used "words" that are not found in the dictionary.

It is an interjection or a "filler" used when failing to find quickly the right words to describe something. The closest English counterparts that I could think of would be "well" or "you know" used as an interjection.

"Well, you know, how should I put it...?"

or

"How should I put it? It's like, umm..."