To dumb down is an alternate way to say you're doing "downer" drugs (i.e. opiates, weed, etc)
Time to dumb down boys!
Guy 1: What you up to man?
Guy 2: 'bout to dumb down, what's good with you?
to make stupider; reduce the intelligence of
Listening to George W. Bush really dumbed me down.
the act of making something easier to understand, not exclusive to a sped
, first used by Dan Rather
on the CBS Evening News
Chadwick: Hey Raul, what did you get on Mr. Abernathy's History test?
Raul: I got a 7 dude
Chadwick: Holy Shit man, Abernathy was using sock puppets to demonsrate Manifest Destiny, how much more does he have to dumb-down the lesson for you?
What happens to people who learn definitions from this retarded site.
I go to urbandictionary daily to dumb down myself with retarded and/or completely incorrect definitions.