Colloquial term often used to describe a strong or muscular person.
El cuerazo del gimnasio impresionó a todos con su fuerza y resistencia.
The muscular person at the gym impressed everyone with his strength and endurance.
A pesar de su tamaño, el cuerazo es muy ágil en la pista de baile.
Despite his size, the muscular person is very agile on the dance floor.