zackvision
completely sneaky and undetected way of looking at boobs; extreme peripheral vision.
Guy: "Whoa you got some great zackvision going on there!!!"
Other Guy: "I know! I can see her boobs and she doesn't know because i have such great peripheral vision with my zackvision!"
Other Guy: "I know! I can see her boobs and she doesn't know because i have such great peripheral vision with my zackvision!"