The phrase "record-breaking" means that something has achieved or surpassed a previously established record or achievement, setting a new standard or mark that has never been reached before. Full definition
Highly motivated and talented sales professional with 6 years of record breaking sales experience, with uncommon ability to exceed sales target. (jobdescriptionandresumeexamples.com)
I knew nothing of him before that world cup, it's silly to offer record breaking numbers because of one tournament. (justarsenal.com)
With record breaking temperatures around the country, who wants to turn on the oven unless you have to? (lifeglutenfree.com)