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A periodic element with an atomic number of 321. In it's liquid form, can make people become silly, and/ or dumb.
She drank so much siliendum last night that she became silly and dumb.
by ChoppyStix February 09, 2013
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Jul 1 Word of the Day
sending two texts in a row without a reply inbetween.
Rachel: whats up?
Tessa: not to much! hbu?
Tessa: dude, i'm so bored.
Rachel: stop double texting me.
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