Having a tendency to goggle; wide-eyed or staring; resembling or characteristic of goggles.
From 'goggle' plus the adjectival suffix '-y,' creating an adjective that describes something as goggle-like or characterized by goggling.
Words ending in '-y' like 'goggly' are the bread and butter of English adjectives—you can add '-y' to almost anything ('spiky,' 'wormy,' 'bubbly') and instantly make it an adjective describing that quality.
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