The act of taking an enormous dump on any type of floor. The act is usually performed when one is scared shitless and one is not able to reach a shower to take a shump.
Nessie took a flump when she failed her English exam qand could not find a shower to shump. She immediately proceeded to take of her pants, sit on the floor, and take a nice, long, warm flump.
by Nessel-Shump N' Flump August 22, 2014