noun
Kyūshū dialect insult meaning 'idiot' or 'fool'. Stronger than ばか alone; the ちん suffix adds a derogatory or childish tone. Not used in polite conversation.
あいつは本当にバカチンだな。
That guy is a real idiot.
そんなバカチンなこと言うな。
Don't say such stupid things.
Derived from ばか (fool) with the suffix ちん, which adds a derogatory or childish nuance. The exact origin of ちん is uncertain, but it appears in other dialectal or slang terms. The word is associated with Kyūshū dialect.