look up any word, like tribbing:
Based on the recent updates to Facebook (March 2013), which make facebook much more image based and image-friendly, facebook is starting to look very similar to tumblr.

tumblr + facebook = fumblr.
Girl 1: "Hey what's up?!"
Girl 2: "Oh nothing much, just on fumblr sharing some cat pictures."
by malac March 07, 2013