"It's called pantsing someone," my girlfriend said, referring to yoinking one's pants against one's will and without one's knowledge.
"It's called depantsing," I corrected, my hands nervously hovering around my waistband.
The definition of depantsing on dictionary.com is "to remove the trousers from, as a joke or punishment."
Pants is not a verb on dictionary.com. I'll make it up.
v. 1. To put trousers on another quickly, as a joke or punishment.