tarboles
Misinterpretation of the term "tar balls" which are literally balls of tar. These are found along the coast of Hawaii. Jack Johnson is a surfer (from Hawaii)turned musician, hence the reference to a common item that you'd see when surfing.
"...her feet are all covered with tarboles and scars..." Bubble Toes by Jack Johnson
tarboles
mis-interpretation of "tar balls" @see Jack Johnson's officail site
And her feet are infested with tar balls (not tarboles)
tarboles
Word used in surfer turned musician, Jack Johnson, lyrics'.
"her feet are covered in tarboles and scars"