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An abbreviation of the famous Carl Sagan quote, "These are some of the things that molecules do given four billion years of evolution."

Carl Sagan said it to highlight the beauty and magnificence of the evolutionary process, but it is now most often used on message boards to satirize bizarre and otherwise inexplicable human behavior.
A: I saw a mantrain in this porno the other day. It gave me the weirdest boner.
B: TASOTTTMDGFBYOE.
by ynthrepic October 03, 2011
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