vacpoop
Vacpoop is the act of pleasuring oneself in the anal canal with a vacuum hose and sucking poop out at the sametime.
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Vampooper
One who wakes in the middle of the night to defecate or leaves a mysterious dump for someone to find the next morning.
I never could figure out why my girlfriend never poops when we are home together but I woke up one morning to a large turd in the toilet and realized she was a vampooper.