n., the aggregate appearance of a larger, singular freckle formed of individual, constituent freckles when freckle-faced Irish people stay out in the sun too long.
adj., skin cancer.
When Dave was a kid, his friends would count Dave's freckles as he stood in line for the diving board at the neighborhood pool. Toward the end of summer, they noticed his arms no longer had 34,000 freckles (each), but instead just 12. They called each of those 12 a "coneckle."