1. A fact so random that it sounds completely made up
2. Something that is actually true but sounds like bullshit

(also known as a fact of the day and a drunk fact)
"Doug": "For every hour of sleep, you can stay awake for two hours!"
Person 2: "That's definitely a doug fact."
Person 3: "Yeah, where the fuck did you come up with that?"
"Doug": "I didn't come up with it! It's real!"
Person 2: "Yeah right, you're full of shit."
"Doug": "God, you guys never believe me."
by ojaiojai December 14, 2010
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