Definitions

1. adjective

more disorderly or untidy

“The rummier part of the attic was filled with old boxes and forgotten trinkets.”

2. comparative form of ‘rummish’

more like someone or something that is rummish, i.e. habitually searching for or looking at something, often in a careless or disorderly way

“She was a rummier version of her sister, always digging through cluttered shelves and dusty corners.”