i-adjective
Colloquial adjective describing something that looks old, worn, or in poor condition. Related to ボロい, but with a slightly more emphatic or childish feel.
See also: ボロい
この靴、もうぼろっちいから新しいの買わなきゃ。
These shoes are already so worn-out, I need to buy new ones.
彼のアパートはぼろっちくて、雨漏
His apartment is so run-down that it apparently leaks when it rains.
ボロい is a more common colloquial adjective with the same meaning; ぼろっちい is a variant with a slightly more emphatic or childish nuance.
Derived from ボロい (shabby, worn-out) with the emphatic suffix っちい, which adds a colloquial, slightly childish or intensified tone.