Tumblena 

A blonde-haired plant-nymph who was born inside a "prairie-wheel" bush, rather than a garden-flower.

Tumblena never had to ask anyone for a ride to places she wanted to go; she would just wait till the wind was blowing in the right direction, and then hop a lift on a passing "organic bowling ball".

Tumblena by QuacksO November 3, 2018

tumblewad 

A large ball of tree pollen that blows in the wind. Tumblewads of 12 inches in diameter are not uncommon in the spring, particularly when attempting to sweep the driveway.

Yo Tony, check out this tumblewad! The BALLS on this tree...

tumblewad by Dick Shannery April 19, 2019

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

tumblesault 

An inadvertent somersault done with mistaken grace. Usually performed by small animals or someone who is drunk.

My dog just did the craziest tumblesault.

tumblesault by Bippydoodle August 10, 2016

tumblecan

A can of beer found rolling across a parking lot being blown by the wind. Usually found on a college campus or in shady strip malls.

Guys, I found a tumblecan! *holds up empty Budweiser can*

tumblecan by PicklesTehButt January 19, 2016

tumblesalt

The tumblesalt is an acrobatic feat in which a person tucks in mid-air and moves the feet over the head. The tumblesalt can be performed either forwards, backwards, or sideways and is similar to a flip (or, if performed backwards, backflip).

Jane performed a perfect tumblesalt to win the competition.

tumblesalt by Bob bergousicious January 2, 2008

Tumbletard 

A douschebag.

That kid Grant is a tumbletard.

Tumbletard by Johnwell June 14, 2009