rich ran the local 5k road race, but he came across the finish line with no bib or chip, pissing off the race directors and officials because he was banditing
participating in a road race without officially registering for it
"rich ran the local 5k road race, but he came across the finish line with no bib or chip, pissing off the race directors and officials because he was banditing" What is the definition of "banditing"?