noun
grand slam
Used in sports contexts such as tennis, golf, and baseball to refer to winning all major titles or hitting a home run with the bases loaded.
彼は今年、テニスでグランドスラムを達成した。
He achieved a grand slam in tennis this year.
満塁ホームランはグランドスラムとも
A home run with the bases loaded is also called a grand slam.