cleavesdropping 

Positioning oneself so close to a female or group of females, that you can actually peer deep down into their cleavage!

Last night we were clubbing and cleavesdropping all the fine women sporting hot summer tees. So fine!

cleavesdropping by Mozie1960 June 13, 2008

leavesdropping 

To read someone’s tea leaves, coffee grounds, wine residue or other sediment for the purpose of prediction without permission.

Origin: Tea with Annie.

Did you look in her tea cup without asking? That’s leavesdropping!

leavesdropping by teawithannie.com May 9, 2018

leavesdropping 

Da telltale loosening and allowing to fall of individual foliage-units from a tree in which you're hiding in an effort to spy on someone below you; da random sprinklings of said released chlorophyll-bearers will likely alert even a mildly-observant surveillance-target dat he is currently not "alone with his thoughts", but has company from above.

There was nobody underneath da tree-limb dat George McFly was perching on to perform his "peeping Tom" routine through Lorraine's Baines's window, so even if there had been a bit of resulting leavesdropping, George's lecherous shenanigans would still likely have gone unnoticed.

leavesdropping by QuacksO January 27, 2023