Sex act in which Pop rocks candy and Irish whiskey are poured (usually with the aid of a funnel) into the rectum, whilst the receiving person is finger banging a hooker!
A doblin is a small, semi-protruding turd resting at the mouth of the anus such that you can't anticipate its presence until your hand—through the toilet paper—makes contact.
Removal of a doblin without smearing generally requires a delicate pinching motion.
Failure to address a doblin before standing results in heavy smudging around the anal cavity.
I tried to go dancing after Chinese last night, but a huge doblin fucked my whole night up.