When you're really excited to go on tumblr, and you've almost been craving it. It is the equivalent of saying "yum" before dinner, but instead it is used in regards to tumblr.
Ohh yumblr... I can't wait to get to my computer since I started following Skyler's blog.
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.
Buy the mug