Something extremely surprising, shocking, or astonishing; something that makes your eyes literally pop open in amazement.
Compound of 'eye' and 'popper' (from 'pop,' likely imitative in origin, suggesting sudden action). Informal term from 20th-century American English.
Eyepopper perfectly captures the physical reaction to shock—your pupils dilate, your eyelids snap open, your eyeballs almost feel like they're bulging, so the word mirrors your body's involuntary response.
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