Grand Slam is a general sports term applied when achieving something special.
Most common uses:
In tennis, winning the Grand Slam is winning the following four tournaments in the same year: Australian Open, French Open, Wimbledon, US Open. Those tournaments are therefore also known as the Grand Slam tournaments.
... enlarged the democratic space in Kenya, including the expansion of political parties from 11 to 26. President Moi won re-election as President in the December 1997 ...