1 definition by rajeshkoothrapali
When one is in a body of water deep enough to do a "front flip" in; one pulls down their pants, does the flip under water, and evacuates their bowels when only their rear is exposed above the water level thus making it look like a whale's blowhole spraying brown matter.
"Dude, Todd got so hammered at the mexican restaurant that he did a brown whale in the pool later that night. There was shit everywhere..."
by rajeshkoothrapali August 29, 2012