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...
by Harris348 February 09, 2017
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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!
by jchessh22 August 09, 2011
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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.
by Moe.Ron24 May 08, 2016
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