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when you are in the bathtub and your grandma walks in and says "can i help you?" and you say yeah grandma get my back.
I got a dirty bathtub last night.
by aphbesties May 13, 2010
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2
When you ejeculate, and all the semen lands in your belly button. Meaning you must scoop out the semen from your belly button.
"Yo man I had a wank yesterday, and I managed to get a dirty bathtub"
by Kevdoge420 November 01, 2016
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