Rounded, shapeless lumps or drops of something, like a blob of paint or a blob of jelly.
Of imitative or onomatopoetic origin, possibly influenced by 'blob' which may come from 'bleb' (a blister). The word became common in English in the 19th century.
In the 1950s, 'The Blob' became a famous sci-fi horror movie about an alien blob consuming people, and it perfectly captured how the weird, undefined shape makes something feel unnaturally threatening.
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