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1.
Usually when someone makes a mistake, or does something wrong. Also when a misfortunate even occurs.
Person 1: Yo, I dropped 4 g's on the floor
Person 2: Fuck man, that's such a Haydon Yeung

Teacher: You have a 10 page essay due tomorrow

Student: You've got to be fucking Haydoning me!
by DanAlbasry February 18, 2009