noun
octopus; bald or shaven-headed man
A humorous or derogatory term likening a bald or shaven-headed man to an octopus, often used in a teasing manner. The octopus sense is literal but less common in everyday speech.
あの蛸入道、また怒ってるよ。
That bald guy is angry again.
海で蛸入道を見つけた。
I found an octopus in the sea.