Any burns substained to your fingers typically being the thumb during the act of smoking cannabis due to the way the light is held. The smoker typically does not care or feel the burn so they continue to burn the cannabis and their thumb.
"Dude I was so high this weekend I got wicked stoner's Thumb"
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"
A thumb with a tough, dry, outer layer of skin due to any outside force, usually a slight breeze, blowing or moving the flame from a lighter onto the thumb, yielding a tempoary burning thumb and often leaving the thumb tough to the touch.
"Fuck, your car's A/C is giving me stoner's thumb, nig."
"I had a tough time lighting my bowl with that damn wind giving me stoner's thumb."
Someone who is addicted to obtaining money and building wealth. A money addict and fanatic. Breadheads often work more than one full-time job, and some even participate in illicit activities to "obtain the bread".