Capable of being gorged or eaten in large quantities; suitable or appetizing for excessive consumption.
From 'gorge' (to eat greedily, from Old French 'gorge' meaning throat, from Latin 'gurga') plus the suffix '-able' (capable of being).
The suffix '-able' lets English speakers judge almost any food or situation as 'doable'—a gorgeable meal tells you at a glance that it's the kind of food people want to eat in abundance, which is actually useful information.
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