crump 
(krŭmp)
(krŭmp)v. crumped, crump·ing, crumps
v.tr.
1. To crush or crunch with the teeth.
2. To strike heavily with a crunching sound.
v.intr.
To make a crunching sound, especially in walking over snow.
n.
1.
a. A crunching sound.
b. The sound of an exploding shell.
2. A heavy blow.
[Imitative.]