Definitions by Captain Ish

B.O.A.T. 

Biggest Of All Time in referring to a shit. Poop that looks not only inhumanly possible, but also makes you want to show everyone in the house. Nautical references also apply, as it looks like you just shit a yacht.

Me: "omg Mom, come look at this poop!"

Mom: "son you just shit a B.O.A.T."

"That shit was literally the biggest of all time"

B.O.A.T. by Captain Ish August 16, 2009