節穴
Noun
1
noun (common) (futsuumeishi)
knothole;peep-hole
2
noun (common) (futsuumeishi)
bad eyes;tunnel vision
俺の目は節穴ではないぞ。
You cannot pull the wool over my eyes.
Other forms
ふし穴 【ふしあな】 (search-only kanji form)