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the lower part of the digestive track adjacent the anus; the rectum
If you have rough anal sex then you may end up with a sore asstube for a while.
asstube by real id guy June 7, 2009
Related Words
A tube that is shoved up someone's ass. Liquids are then able to be passed through the tube into the person's anal cavity therefore giving them special sensations.
I shoved that asstube into Alby's ass and then I filled his ass with piss and rocketsauce.
Asstube by speedman225 March 17, 2007

assluber 

Assluber is when u put a lot of lube in ur butt for some sexy pounding
assluber by Abbey❤️ June 20, 2021