キショキショ mean in this sentence?


[![enter image description
here](https://i.stack.imgur.com/6hf2C.png)](https://i.stack.imgur.com/6hf2C.png)

In the first sentence the character says being in the same class as someone
you feel at ease with, is fun.

But then he adds

こいつは昔からそういう感性なくてキショキショだけど

The sentence sounds odd to me. "But this guy ever since a long time ago had no
awareness of that so it's pretty gross?"

And his answer is...

"別になくない" Not particularly?




キショキショ(だ) seems to come from 気色(が)悪い through its slangy variation キショい. 感性 is
"sensibility", and in this context the word particularly refers to that of
feeling it fun to be in the same class as their friends. One character
describes his friend as キショキショ "creepy" because of the lack of such a common
sensibility, and the friend protests that（その感性が）なくないよ, which can be seen as
double negation of ある.

