Top Definition
A douschebag.
That kid Grant is a tumbletard.
by Johnwell June 13, 2009

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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.
by Possibly cringe August 14, 2016

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

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

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt