Japanese

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Etymology

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From consonants of ガクブル (gakuburu), which in turn is short for ガクガクブルブル (gakugaku buruburu).

Adverb

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gkbr(がくぶる) (gakuburu

  1. (Internet slang) Abbreviation of ガクブル (gakuburu, chattering (of teeth) and trembling (with fear)).