빠삭빠삭

Etymology
Reduplication of.

Ideophone

 * 1)  indeed crunchingly; while repeatedly lightly stepping on, grinding, or breaking with a crunching sound
 * 2)  indeed crunchingly; while repeatedly biting on with a crunching sound
 * 3)  indeed crunchingly again and again
 * 4)  indeed particularly crisply, as to crack easily

Usage notes
is another intensive form of, and is considered less emphatic than.