1. comparative form of grooty; more grooty; resembling, containing, or filled with grout
Usage: informal; chiefly British
2. comparative form of grooty; more unpleasant, dirty, or unwell in appearance or condition
Usage: informal; slang; chiefly British

Examples

• The bathroom tiles looked groutier after months without proper cleaning.
• His appearance grew groutier as the camping trip wore on.
• The construction site was groutier than expected, with dust and debris everywhere.
• She felt groutier than usual after working in the garden all day.
• The old basement floor was groutier and more deteriorated than the upstairs.
• The groutier the mortar became, the more unstable the wall appeared.