Sunday is St. Patrick's Day. And you know what people LOVE when they're drunk? A know-it-all spouting random trivia facts. Here are 10 St. Patrick's Day trivia facts, so YOU can be everyone's favorite dude:

#1.) ST. PATRICK wasn't Irish. He was born in either Scotland or Wales, and was brought to Ireland as a slave.

#2.) You know what else isn't Irish? "Danny Boy". It was written by an English songwriter named Frederick Weatherly . . . he set it to an Irish melody called "Londonderry Air".

#3.) Also, "When Irish Eyes are Smiling" was written by two Americans.

#4.) St. Patrick's name wasn't Patrick. It was actually Maewyn. And the holiday marks his DEATH, not his birthday.

#5.) America is way more Irish than Ireland. There are approximately 36 million Americans with Irish ancestors. The population of Ireland is about 4.5 million.

#6.) 1% of all the beer in the WORLD is consumed on St. Patrick's Day.

#7.) Guinness sees the biggest boost of any individual beer on St. Patrick's Day. On the average day, people worldwide drink 5.5 million pints of Guinness . . . on St. Patrick's Day, it jumps to at least 13 million pints.

#8.) America's bar tab on Sunday will be approximately $245 MILLION.

#9.) Americans are in the middle of a new love affair with Irish whiskey. Sales of Irish whiskey are up 400% since 2002. They've even jumped 22.5% in the past 12 months.

#10.) Approximately 133 million American adults . . . or 56.3% of the adult population . . . will celebrate St. Patrick's Day this year. And 84% will wear green.