mouldy homework
Really overdue homework or homework that has been done but the teacher has either forgotten or chosen not to take it in.
Person 1: "Woah! I got this homework like 5 weeks ago and i haven't even started it yet!"
Person 2: "Dude, miss is gonna be mad, that's such mouldy homework."
Person 3: "No way man, you'll be fine, i've got so much homework in my folder and my teacher hasn't even taken it in yet. It's getting really mouldy."
Person 2: "Dude, miss is gonna be mad, that's such mouldy homework."
Person 3: "No way man, you'll be fine, i've got so much homework in my folder and my teacher hasn't even taken it in yet. It's getting really mouldy."