"To win the cup" means to emerge as the champion or winner of a competition or tournament. It refers to achieving first place and bringing home the coveted cup, trophy, or prize that is awarded to the victorious team or individual. Full definition
What kind of football was played while winning some cups in the 90's? (justarsenal.com)
We didn't have the biggest success because we didn't win the cup final but we were completely in the race, completely focused and nothing changed. (squawka.com)
We just won the cup for the third time in four years. (justarsenal.com)