look up any word, like the eiffel tower:
A trip to the bathroom that is so massive that the toilet can not handle it all in one flush. One must often flush multiple times to deal with all of the toilet paper that comes with a large dump of this nature.
Martin: Dang, you were in the bathroom a long time.

Steve: Yeah, that was a real multi-flusher.
by Habeas_Corpus March 08, 2011