Plural of gawky used as a noun; people who are awkward or ungainly, or potentially a dialectal term for gawky individuals.
From 'gawk' plus '-y' adjective suffix, then used nominally to refer to awkward people; '-ies' creates the plural; informal and dialectal formation.
Nominalizing adjectives—turning 'gawky' into 'gawkies'—is a natural process English speakers do constantly in casual speech, creating informal nouns that might never make it into formal dictionaries but feel perfectly normal in conversation.
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