The person who looks up dumb is in fact looking dumb but is also looking it up to check if they fit the definition
The disability of being good at chess/ the ability of being terrible at chess
Huh, you can't play chess? That's dumb
Lila: I’m going to cheat off of nick!
Jack: no please don’t
Lila: why not?
Jack: he is so dumb! I cheated off of him as well and I got a 30!
Example 2:
Bailey: what’s 15x2
Jack: 500
Bailey: omg are u dumb??
Dumb= very, with emphasis..like “‘mad” (“mad cool”).
I was dumb scared.
She is dumb hot.
Stupid people who do not requite romantic feelings for amazing/awesome/incredible people
He is dumb.