Dumbboat 

Someone that says something so freaking stupid or says something really dumb. You have no word to call them they are a dumbboat

“Can you cook steak in a dryer?” A student asked. Teacher replies,”Are you a dumbboat?”

Dumbboat by Kviv28dance1221 May 2, 2018

dumboat 

When in a crowd you are surrounded by idiots.

Tim: these people are just stupid

Wyatt: Dumboat!

dumboat by THezebra@!124 May 17, 2010

dumb boat 

A drunk girl who try's to hit a boy she likes because he called her a bitch

Lol dumb boat

dumb boat by Elizabeth belle April 20, 2017