버썩버썩

Etymology 1
Reduplication of.

Ideophone

 * 1) extremely dryly, aridly, parchedly
 * 2)  while moving physically close to in an annoying way
 * 3) very suddenly and repeatedly moving to a large extent
 * 4) repeatedly tensely, repeatedly strainedly

Etymology 2
Reduplication of.

Ideophone

 * 1)  quite crunchingly; while repeatedly stepping on, crushing, or snapping with a crunching sound
 * 2)  quite excessively dryly, as to flake easily

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