One who views a tumblr user's "likes" without him or her knowing. This is accomplished by using the URL www.tumblr.com/liked/by/username. The user must not have checked a box in the settings to hide the likes. See also, tumblr creeper
Jim: "What the hell are you doing man?" Neal: "Dude, I'm checking Scott's tumblr likes because he didn't hide them. Man, he likes a lot of porn on here." Jim: "Dude, you're a friggin' tumblr voyeur."
by Jamie Mac123 July 2, 2013