beast
n. countablen. someone who is incredibly good at something or works extremely hard. You use it to show respect for someone's strength, skill, or energy.
n. a person who performs with exceptional skill, power, or intensity. Slang in register; frequently used in athletic, gaming, or professional contexts to denote high-level competence.
He is a beast on the basketball court.
She was a total beast during the final week of the project, finishing every task ahead of schedule.
While his teammates struggled with the physical demands of the training camp, he proved to be an absolute beast, consistently outperforming the veterans in every drill.
From Middle English beeste, beste, from Old French beste (French bête), from Latin bēstia (“animal, beast”); many cognates – see bēstia.
Often used in the phrase 'a beast at' or 'a beast on' to specify the area of expertise.