Someone who looks this up or just a man or animal that do unfavorable things seen as stupid or dumb.
"Vaccines are bad for you >:("
"You are a dumbass...>
Anybody who searches up this word on urban dictionary
Fred: oOoOhH hEhE wHaT iF i sEaRcH uP dUmBaSs On uRbAn dIcKsHiOnArY
Bill: 1: it makes you a dumbass
2: u spelt that wrong fucking retard
An idiot who annoys everyone he’s around and never knows when to shut up.
Guy 1: “Ethan just took a shit on the floor”
Guy 2: “What a Dumbass”