I have come across two sentences in a manga that is using くん in a way that I can't seem to find any information on, in both my books and online. I am guessing this may be some sort of slang, odd grammar or a compound of words/grammar that dictionaries don't seem to pick up on.
「おめーはちょくちょくうちの晩飯 食いにくんなー」
and
「てゆーか なんで連れてくんだ?」
Slight edit: maybe this is some form of 来る?