Top Definition
1.The condition of greater thumb strength caused by excessive texting.

2.An exercise video used to stimulate thumb strength.
"I have been texting so much I have Thumbs of Steel"

"I know, you almost broke the controller during our last XBOX session"
ayon kay Mike Corning ika-18 ng Nobyembre, 2008
5 Words related to Thumbs of Steel

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