This is a tongue twister - also a drinking game (probably a lame one, since my mom taught it to me twelve years ago). Person A starts with the first item, saying it aloud. Person B (or Person A if he has no friends) follows with the first item, concatenating the second item. Person C (or Person A if you only have one friend) follows with the first two items, adding the third, and so on.

• One hen
• Two ducks
• Three squawking geese
• Four limerick oysters
• Five corpulent porpoises
• Six pair of Donald Verris' tweezers
• Seven thousand Macedonians dressed in full battle array
• Eight brass monkeys from the ancient, sacred crypts of Egypt
• Nine apathetic, sympathetic, diabetic old men on rollerskates with a marked propensity towards procrastination and sloth
• Ten lyrical, spherical, diabolical denizens of the deep who danced around the qua of the quay of the queasy, all at the very same time

Disclaimer: I learned this aurally, so it might not be dead accurate with the way you know it. Wait, my mom's a freak...no one in their right mind would know this.