Verb
make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic
sit on one's heels
Source: WordNetThe dress got wrinkled Source: Internet
crease the paper like this to make a crane Source: Internet
In some cultures, the women give birth while squatting Source: Internet
The children hunkered down to protect themselves from the sandstorm Source: Internet