
鼻の下伸ばしやがって
It's saying something about stretching the nose.

It makes no sense to me in context either, this is the whole pic (it's bungou stray dogs fanart)
https://78.media.tumblr.com/a06a2870a63fa487b88a7dbbd596cce5/tumblr_paiaxgsS8E1rx4ouvo1_1280.jpg

Hey! In Japanese, it's a saying that's difficult to translate to English. It doesn't mean strerching his nose in a literal sense. It means something along the lines of "You look dunb being lovestruck by that woman" or "What are you grinning about?"
Hope that helps, good luck with your Japanese. (๑•ㅂ•)و✧
Anyone here know some japanese for this, or at the least what is that first kanji
https://imgur.com/a/PjXq1HL
After 2 hours of fruitless searching, asking is all i can do ;-;