Gum Tar 

1. Being physically uncoordinated
2. Being otherwise clumsy in any respect
3. Similar actions to a person with Down Syndrome

Steve was a massive Gum Tar today.

Gum Tar by Danus :) May 2, 2011

Gumtard 

Noun- an individual who is making extremely ignorant life decisions similar to that how a long haired hippie with no teeth and an addiction to millenial slang speech.

Quit acting like such a gumtard.

You're a Gumtard! You can't eat chips!

Gumtard by Wahwah burger July 30, 2019

Gumtard 

An idiot that asks stupid questions, with spelling mistakes and lack of punctuation or grammar, about an item you have advertised for sale on gumtree.com.au

I got a question from a gumtard about the car I have for sale, he asked "whats ur bst prise on dat car and dos it come with rejo and are the breaks ny good"

Gumtard by Sugar Glyder February 8, 2018

Gumtard 

A person, usually a YouTuber, with little to no understanding of how the real world works. Usually, the only way this people know how to solve problems is to snitch on others or dissing on badly-worded trap songs.

-"Hey, are you promoting gambling to kids?"
+"Hell no! I'm not a gumtard"

Gumtard by AverageUser12 January 8, 2019