decaying or deteriorating condition of leather due to fungus or moisture

figurative use to denote something that is beyond repair or ruined

जो मरम्मत के योग्य नहीं है

English Usage: His relationship spiraled into leather rot after years of neglect.

Hindi Usage: वर्षों की उपेक्षा के बाद उनका संबंध चर्म के सड़ने में बदल गया।