i Register
In some senses, mouldy is marked as derogatory, obsolete, slang, UK, colloquial. Watch for register when choosing this word.
adj
Covered with mould.
Showing signs of neglect; disused.
Worthless; lousy; rotten.
'Go cuddle up to your mouldy old papers,' she shouted at him. 'See how warm they'll keep you.' She slammed the door and made to walk off.
Gray-headed, whether from age or hair powder.
Let him be great, as e'er he will, / He's rotten at the heart's core still; / Yet counsel from his mouldy pate, / Supports the trembling chair of state, / And scatters with unsparing hand, / A thousand miseries o'er the land; […]