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、ひるからなにってねえんだった。
ここでわかれんのもなんだしよ、なんかこうぜ?

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?