tumblehair 

n. Resembling a tumbleweed, this common household entity consists of and feeds predominantly on mammals' sheddings. Left entirely unchecked, tumblehairs may eventually pose a fire hazard.

Let's get out of here before his tumblehair eats him. This guys apartment gives me that same creepy feeling as the Little Shop of Horrors.

tumblehair by DoctorFustigus April 8, 2009

Tumbletard 

One who says things that are retarded on Tumblr. Usually in reference to the LGBTQ community. They are known for calling people misogynistic, racist, sexist, and other such discriminatory adjectives.

I went on Tumblr and said I'm new here. I said I'm a white Christian straight male, and i received hundreds of hate comments calling me a rapist, sexist, racist, misogynistic bigot. The commenters were all tumbletards.

Tumbletard by Possibly cringe August 14, 2016

Tumbletard 

A douschebag.

That kid Grant is a tumbletard.

Tumbletard by Johnwell June 14, 2009