1. A person who embodies and defines what it means to be the epitome of a fucking dumb fuck, multiplied by 2. An extreme variation of dumb fuck. Usually such people are so stupid they can piss anyone off like a fire hose aimed at a fly.
2. A person who is dumb enough to have sex, (especially in a threesome including two guys, or rather two dicks hence the term "double-dick") with people who they know have more STDs than a town brothel... so many STDs in fact that they got rejected by all the pimps in town when applied for jobs as hookers.
1. "Urrrgggggh!!!! I don't get how that double-dick-dumb-fuck doesn't understand that $5 is the same as $4.99"
2. "Those Starbucksters are a bunch of double-dick-dumb fucks"
3. "Go back to kindergarten you 40 year old, double-dick-dumb-fucker!!"
4. "Yeah, that was a double-dick-dumb-fucking idea to go to that orgy in Harlem last night... now I know I have STDs"
5. Bob: "Where were you last night Jim?"
Jim: "Participating in a double-dick-dumb-fuck with John and Jezabell who both have obvious genital warts"
Bob: "YOU DOUBLE-DICK-DUMB-FUCKING-FUCKER!!! Now YOU have them. Didn't you have sex ed at your school? you shit brained double-dick-dumb-fucking drop out"