crunch

intransitive verb, transitive verb

to bite or chew with a noisy, crackling sound
to press, grind, tread, fall, etc. with a noisy, crushing sound
Informal to process (a vast quantity of numbers or other data) rapidly: using a computer to crunch population statistics

noun

the act or sound of crunching
an exercise much like a sit-up, in which the upper body is raised only slightly off the floor rather than to an upright position
☆ Informal a tight situation; specif., an economic squeeze
☆ Slang a showdown

See crunch in American Heritage Dictionary 4