expression
Internet slang abbreviation of ガクガクブルブル, describing someone shaking and shivering from fear or nervousness. Used in casual online communication.
See also: ガクガクブルブル
ホラー映画を見てgkbrしてる。
I'm trembling with fear after watching a horror movie.
明日の面接を思うとgkbrだ。
Just thinking about tomorrow's interview makes me tremble with fear.