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.
... anatomy, the urethra is a tube that connects the urinary bladder to the outside of the body. The urethra has an excretory function in both sexes, to pass ...