Thumb Thug 

When someone acts tough through text messages, but, when they run into you, they run away.

Joe: Roger keeps sending me these texts on my phone saying he's gonna whoop my ass when he sees me.

Dave: He tried to do that to me one time. I ran into him at the gas station and called him out, he got into his car and took off real quick. Don't worry about him, he ain't nothing but a thumb thug!

Thumb Thug by jchessh22 August 13, 2011

Thumb Thug 

Someone who talks mad shit online, without the intention or means to back it up in person.

I wrote a post on facebook, and a thumb thug came by talking shit.

Thumb Thug by Moe.Ron24 May 13, 2016

Thumb thugging 

Talking gangsta through text messages or social media. Making yourself harder than what you really are. Someone who keeps it real through social media but a mouse in public....

Dude thought he was hard on facebook yesterday thumb thugging but I seen him in person and he had nothing to say...

Thumb thugging by Harris348 February 9, 2017

Thumbthumbs 

A cat with a serious problem. Mainly white cats. A cat with freaking thumbs

I think your dog is a thumbthumbs.

Thumbthumbs by pikachuphantom February 5, 2010