Plural of boko; possibly referring to multiple instances of something boko-related, or a plural form from another language.
If from 'boko,' the plural would follow standard rules. The form might also represent a borrowed plural from African languages, where different pluralization rules apply than in English.
When we borrow words from other languages, their plurals sometimes come with them—'bokos' might preserve African pluralization patterns, reminding us that English is a patchwork of different languages' grammar rules!
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