A wannabe gardener who kills plants. Opposite of green thumb.
I have killed all the plants in my house. I must have a black thumb.
by Clifford D. September 13, 2006
A gang group in the south east side of Canada. Origanallly founded to herd black sheep, now help to protect the farmland.
"Man, those Black Thumbs are crazy!" Said Tommy
by group4eveer October 16, 2012