Top Definition
The term used for the dry, cracked, and dead layer of skin on one's thumb, caused by repeatedly lighting a lighter while getting high.
"Hey Tom, do you think Jack does weed?"
"Well fuck man, you think he gets that stoner thumb from nowhere?"
by Mister #4 July 17, 2005
stoner thumb is the callous that forms on the side of your thumb as a direct result of using a lighter way too much. This usually occurs during long sessions of smoking the herb.
"Son, whats that on your thumb"
"A callous"
"from what?"
"not from my lighter sir"
"really because it looks like you've got a stoner thumb"
by knels October 15, 2009

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