"Pootis" is a quote from the Heavy, from Valve's free-to-play Team Fortress 2 game. The original quote by said Heavy is "Put dispenser here". However, due to his accent, it appears to sound like he is saying "Pootis spencer here". Therefore, people have grabbed the word "Pootis" from this, thus creating an internet meme.
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by Outspace June 23, 2013