joy-pantsing

to stake out or case a clothing store's dressing room, waiting for somebody to sling their pants over a partition wall in hopes of grabbing the pair, hastily sliding them on over your own and running about before eventually abandoning the pants at an undisclosed location.

"dude, i was like trying on some slacks at AE when some douche grabbed my dockers and went joy-pantsing. it bummed me out. where the popped collars at?"