RACEFAN's definitions
its when you accomplish three things before taking a shower, shitting, beating off, and then taking a bong rip.
before i took a shower i took a shit, wacked off, and before i got in the shower I took a bong rip.  THE GRANDSLAM.
by RACEFAN August 24, 2008
 Get the the grandslammug.
Get the the grandslammug.