A dump that one would likely find in a mall bathroom toilet because the producer was so proud of it that he/she decided not to flush so that other people could see it. Can also be used to describe the estimated size of an upcoming dump.
Hey Eric check out this Mall Dump I just took in your toilet...SWEET!...or...Dude we gotta find a bathroom quick because I have to take a massive Mall Dump...HURRY!
by Baroo72 February 16, 2009