crinkled chestnut

a word that can express any feeling really .
no one knows why crinkling someone's chestnut would be good, but it's hard to imagine what crinkling someone's chestnut is.

is it a compliment? a swear? is it even an action? no one knows

last night, she crinkled my chestnut.

he failed all his classes, he really crinkled the chestnut this time.

she's such a crinkled chestnut.