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When you twist your penis 180 degrees and pee in your sisters mouth whilst playing twister. One hand or leg needs to be on a yellow color.
We had a family game night but it ended up in a sister twister
by T sckwizzle September 07, 2016
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Aug 3 Word of the Day
Condition which causes you to place an Amazon order, then shortly after remember something else you needed and place another order.
Wow, 10 Amazon boxes showed up on my door today. My Amazheimer's must be acting up again.

Person 1: Bro, your Amazheimer's is getting out of control.
Person 2: It's OK, I have Prime.
by SamboMayhem August 01, 2020
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2
When you put your dick in your girls ass, and proceed to spin her like a helicopter blade. Doesn't have to be your sister, but it can be. Works best with small girls as they are easier to spin.
I had a dream last night me and Mila were doing the sister twister when my dad walked in.
by BigOlBeanBoy June 16, 2018
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