Dialect comparative form meaning 'more forward' or 'further along'; a regional variant of 'forrard' with comparative inflection.
From 'forrard' plus the comparative suffix -er, creating a dialectal comparative form. This represents how regional speech patterns apply standard grammatical rules to non-standard words.
Regional dialects aren't 'bad grammar'—they're following the same rules as standard English; speakers just applied them to different base words, showing that 'forrarder' is perfectly logical in dialect terms.
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