When you leave hamster food out too long and it goes all moldy and stale like cardboard.
The gone off hamster food tastes like cardboard.
When you leave a lime out too long and it goes moldy.
The gone off lime tastes like citrus shit.
When cheese is in the fridge too long and it goes moldy.
The gone off cheese smells like farts.
When you leave goat cheese out for too long and it goes stale.
The gone off goat cheese smells like salmonella.
When you leave a Milkybar out too long and it goes slimy.
The gone off Milkybar tastes like slime.
When it looks like bird poo.
Gone off sun cream tastes like bird poo.