Prickle Bushes
A common name for large thickets of blackberry bushes. Often thought of as a pest, these bushes grow quickly and engulf trees, barns, and abandoned houses. They have annoying prickles that will catch on your clothing, and give you shallow cuts on unprotected arms and legs.
"Watch out for those prickle bushes, Tom! You'll get stuck and they'll give you some nasty cuts!"