To have sex with a particularly large and/or undesireable female. Derived from Moby Dick, the great white whale.
by Gets September 23, 2003

by H/K August 16, 2008

by anthony's fake laugh February 13, 2018

One in a great while a person with take a massive assive shit that will hurt. This only counts if its a single turd. This turd is named Moby Shit.
by zacherzach February 21, 2011
