Dictionary.net

make wrinkles or creases into a smooth surface; "The dress got wrinkled"

a crunching noise

sit on one's heels; "In some cultures, the women give birth while squatting"; "The children hunkered down to protect themselves from the sandstorm"

make a noise typical of an engine lacking lubricants

make wrinkles or creases into a smooth surface; "The dress got wrinkled"

make a crunching noise, as of an engine lacking lubricants

a crunching noise

To crunch; break with the teeth; squeeze.

The act or sound of crunching.