I think he's referring to a YOUTube meme: "Badger, badger, badger, mushroom, MUSHROOM!"

Comment #135383 by - Zed

wow - by Reality Lord

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nice - by Reality Lord

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Gamer rage - by calvin5040

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Pigs CAN fly, it's just the landing that they haven't licked yet :D - by Brawler

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ikea or Walmart. 5L - by thecrotchetyoldcynic