When you defecate the bed profusely to where it's overflowing.
Dude, I was so sick I ended up brown boating my girlfriends bed.
A banana split made in a butt crack
I went to DQ and they wouldn't let me order a banana brown boat
Shitting in the tank of a toilet
When you shit in the tank of a toilet and listen as someone gags and screams at the sight of the toilet filling up with shit and clogging. otherwise known as the brown boat