So Seamus is a Harry Potter Drinking Game that my friends and I came up with. Basically the essential rule is that every time you see Seamus Finnegan on screen you must scream "SEAMUS" and take a drink. However; we've added additional rules for each of the films... quite extensive ones...

For all Movies Drink...

• Whenever you see Seamus Finnegan on screen (and scream his name)
• Take a Shot whenever Seamus sets fire to something
• Take a drink whenever you miss Richard Harris (particularly after the second film)
• Take a drink every time Ron says "Bloody Hell"
• Drink whenever you see Lucius Malfoy's Pimp Cane
• Drink whenever Ron makes a scared face or squeaks

For Harry Potter and the Philosopher's Stone...

• Take a Shot when Hagrid says "You're a Wizard Harry"

For Harry Potter and the Chamber of Secrets...

• Take a Shot when Ron says "Follow the spiders? Why couldn't it be follow the butterflies!?"

For Harry Potter and the Prisoner Of Azkaban...

• Take a drink when you see the random black kid
• Take a Shot when the line "It's like trying to catch smoke, like trying to catch smoke with your bare hands"
• Drink when you see Nigel! :)

For Harry Potter and the Goblet of Fire...

• Take a Shot when Krum says "You have no business here!"
• Drink whenever you see Karkaroff's Pinky Ring
• Drink whenever a Twilight reference is made when Robert Pattinson is on screen

For Harry Potter and the Order of the Phoenix...

• Drink whenever you see Aunt Petunia in her hideous day dress

For Harry Potter and the Half-Blood Prince...

• Take a Shot when Harry is on Felix Felicis - and you die laughing
• Drink when Ron is called Won-won

For Harry Potter and the Deathly Hallows Pt.1...

• Chug your drink when Hermione and Harry dance awkwardly

For Harry Potter and the Deathly Hallows Pt.2...

• Drink every time someone mentions how much hotter neville got