Done [JP] Help with a short phrase

[yukihito]

I'm having trouble with one line in the image below, the box in the lower left panel which says あいつはっちゅーと. I've tried, but I haven't managed to make any sense of it so far. I'm not sure whether this would be relevant information, but the main male character uses Kansai dialect.

Thank you in advance!

Spoiler

 

[mikkih]

ちゅー　＝　という　（と言う）

あいつはっちゅーと = あいつはというと 　= あいつは

　

 

[yukihito]

Thanks a lot for your help, mikkih!