What does Boat Butt mean?

Boat Butt meaning in Urban Dictionary

The regrettable and highly painful sensation that develops inside posterior when one sits in a rowing shell for too much time. The feeling resembles sitting on a bed of needles or having your ass tasered. Most likely the most excruciating pain known to humankind after the 2k. You can additionally experience vessel butt by spending too much time on an erg.