Wearing panties on the head like a hat or a mask.
For the special case of brassieres being used as headwear, see bra on head, and for the case of bloomers, see bloomers on head.
For the case of male underwear being used as headwear, see pantsman.
This tag implicates panties and object_on_head (learn more).
The following tags implicate this tag: panty_mask (learn more).