During anal sex, going from ones ass to ones mouth.
-Hey man, what did you do to that chick last night?
-I took her to the cash machine.
by mrjswilson January 1, 2008
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Another way of saying Ass To Mouth, or ATM for short (ATM of course meaning Automated Teller Machine, another way of saying Cash Machine)
She went and did a Cash Machine on me, dirty bitch!
by DJam21 February 21, 2010
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