The phrase "biggest culprit" refers to the main or most responsible person or thing that causes a problem or wrongdoing. It identifies the most significant source of blame or fault. Full definition
When big culprits of CO2 emissions, like the airlines, decide to go green, we at Treehugger take notice. (treehugger.com)
BRASILIA (Reuters)- Cattle ranchers are far bigger culprits in Amazon deforestation than soy farmers, a study showed on Tuesday, as the environmental record of Brazil's commodity exporters comes under increasing international scrutiny. (reuters.com)
Ramsey was one of his side's biggest culprits for needlessly gifting possession to the hosts and allowing Mauricio Pochettino's men to build up a head of steam. (justarsenal.com)