びっくら

adverb, noun or participle which takes 'suru'

in surprise; startled; with a start

Colloquial variant of びっくり, used to express sudden surprise or astonishment. Often used adverbially or with する.

See also: びっくり

• 急きゅうに肩かたを叩たたかれてびっくらした。

  I was startled when someone suddenly tapped me on the shoulder.