A play on Silver-Tounged. Someone who has the skill to sweet talk someone via text message as opposed to in person
“So after texting her for a bit, I convinced her to come over to my place. Quite silver-thumbed of me”
“That Jake guy is a silver thumbed bastard, I’ll give him that”
They're like a silver tongue, persuasive and suave, but only over text.
He's a legend! He's got silver thumbs all the girls love him on snap!