go to the bathroom
to make a deposit or make a luther

metaphor can be extended in economic terms
M1 - Very liquid cash (pee)
M2-M6 (use your imagination)
M7- not liquid at all "thick as jelly" (poop)
Beanerous Brokus I - "I need to go to the bank to make an M1"
or
Beanerous Brokus I - I need to go to the bank and make kurry
or
Beanerous Brokus I - I need to go to the bank and make a Luther
by Beanerous Brokus I February 16, 2006
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After sex, the man defecates into the woman's anus through a clear glass tube thus imitating the vacuum tubes at a bank.
Dude, I heard Matt and Annie were "going to the bank" last night. I wish I had seen that.
by K-Noodle November 28, 2007
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