polo

1. (uncountable) A ball game where two teams of players on horseback use long-handled mallets to propel the ball along the ground and into their opponent's goal.Examples: "There were polo fields – sometimes green, sometimes brown – where in the old days, people had actually played that strange game that seems like a drunken bet about golf and horse riding."uncountableusually

2. (countable) A polo shirt.Examples: "Then on the second floor there is the creepy boy’s section, which had little headless mannequins in premium polos ($39.50), rugby shirts ($49.50) and a precocious leather pilot jacket for $148."countableusually