A lump or blob of soft material, like a glob of honey or paint.
Likely derived from globe or a variant of glop, emerging in American English in the mid-1900s to describe an indefinite, rounded amount of something thick and sticky.
The word 'glob' is wonderfully onomatopoetic—it sounds somewhat messy and informal, which is why it's rarely used in formal writing but feels perfect when you're describing actual goopy things in everyday conversation.
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