The phrase "Mallu with big _and _ 3zip — proper paper" does not appear to be a standard idiom, official term, or widely documented slang in Malayalam or English. Based on the individual components, it most likely refers to a specific, possibly technical or niche, context:
If this is a specific requirement for a project, legal filing, or organizational system, you may want to verify if it refers to a particular brand of executive organizer or a specific academic standard for submitting papers. Mallu with big _and _ 3zip
: This likely describes the physical capacity or dimensions of the storage item (e.g., a "big and wide" 3-zip binder) designed to hold "proper" or official documents. The phrase "Mallu with big _and _ 3zip