Spying/Eavesdropping from behind doors,fences,curtains etc.(Courtesy of Gladys Kravitz from the 60's T.V. show, Bewitched).
I got busted kravitzing when the curtains blew open.
the act of being a nosy neighbor
While kravitzing I saw the neighbor carry a large rolled up rug out and place it in the back of his car. I haven't seen the roommate since!"