This does not appear to be a recognized English word.
This appears to be a non-standard double-plural or corrupted form, combining 'automaton' with multiple pluralization markers or suffixes, with no documented usage in standard English.
Creating words like 'automatontons' shows how English allows us to play with language rules, even when we break them—linguistic rule-breaking is how slang, dialects, and sometimes new real words emerge from creative expression.
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