Definitions from Wiktionary (GRB)

▸ noun:  (astronomy) Initialism of gamma-ray burst. [(astronomy) A flash of gamma rays that seem to originate from a random point in the sky; their most likely sources are believed to be supernova explosions of a very massive stars and mergers of neutron stars.]
▸ noun:  (Internet slang) Initialism of Golden Retriever boyfriend. [(Internet slang) A man who is extroverted and excitable, kind, openly affectionate, confident, happy about life, and immensely caring toward his partner, but possibly naïve or unintelligent.]



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