Covered with grime; made very dirty or grimy (variant or emphatic form of 'begrimed').
Possibly from begrim (verb, a variant of begrime) + -ed, creating a doubled consonant before the suffix. This may represent dialectal or emphatic pronunciation.
The doubled consonant 'mm' before the 'ed' suggests this might be a regional or emphatic variant—it's like saying 'begrimmed' extra firmly. Many dialect words preserve older pronunciation patterns that standard English simplified.
Complete word intelligence in one call. Free tier — 50 lookups/day.