The way way Sofia says “really”
Sofia: “damn my eyebrows were dumb thick”
Cole: “wtf”
A really dumb person who is an ass to everyone
When you have to take a nap, but you don't, even though you lied down, and later you keep saying you should've taken a nap. That makes you dumb.
The definition gives the example, you dumbass
When you find something interestingly stupid and funny.
wow, that's dumb, Marty farted in Mr. Jesse's face.