意向形 (いこうけい)[2]

volitional form​; let's do~

Explanation of 意向形 (いこうけい)[2]

そういや、 昼ひるから 何なにも 食くってねえんだった。
ここで 別わかれんのもなんだしよ、なんか 食くい行いこうぜ?

Speaking of which, we haven't eaten anything since lunch.
It's not like we're splitting up here, so why don't we go and get something to eat?