1. superlative form of backwoods; most characteristic of or resembling remote, sparsely settled, or undeveloped rural areas
Usage: informal; superlative degree
2. superlative form of backwoods; most unsophisticated, crude, or lacking in refinement
Usage: informal; superlative degree; often mildly derogatory

Examples

• That was the backwoodsiest cabin I've ever seen, with no electricity or running water.
• His accent was the backwoodsiest I'd heard in years.
• The backwoodsiest parts of the state still rely heavily on hunting and fishing.
• She found his manners the backwoodsiest of all the guests at the dinner party.
• The backwoodsiest regions of the mountains have remained largely unchanged for decades.
• He wore the backwoodsiest outfit to the city event—flannel shirt and work boots.