Top definition
A girl on Tumblr who is associated with you (willingly--- both of you agreed on this relationship) online. You might not even know each other in real life.
Bob's latest Tumblr post says, "I'm following everyone back 100% until I find a Tumblr girlfriend.
by cookiesn'cream July 28, 2013
Get the mug
Get a tumblr girlfriend mug for your mate Georges.