Currently crying loudly and uncontrollably, often with visible tears and sniffling.
Present participle of 'blub,' British slang shortened from 'blubber.' This informal version became popular in 20th-century British English as a more casual way to describe crying.
British kids have used 'blubbing' as a taunt on playgrounds for over a century—it's the kind of slang word that parents understand but sounds silly enough that it defuses the seriousness of actual tears!
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