after herman gave bonnie the speed bag for a good 7 minutes, he fell to the floor and clutched his lower abdomen in pain because of his extremely sore testicles
a rapidly performed version of the [punching bag]
"after herman gave bonnie the speed bag for a good 7 minutes, he fell to the floor and clutched his lower abdomen in pain because of his extremely sore testicles" What is the definition of "speed bag"?