This is stupid enough to be an urban legend, but after reading the E-Medicine review of foreign bodies found in the lowest end of the GI tract, you’ll know that people are crazy enough to try anything.
The top linked story relates a supposed practice of attempting to become drunk using vodka soaked tampons.
Given that even the super plus size does not hold very much liquid, the possibility of achieving even a micro-buzz from such a practice seems remote, even if pure grain alcohol were used. That would be very painful and even more damaging than using vodka.
This idea falls under the heading of self abuse, and the risk to tender mucous membranes most certainly outweighs the supposed “benefit”.