1. (v.) To connect two pieces of electronic equipment that previously were considered incompatible, usually in pursuit of some electro-orgasmic experience.
2. (n.) A soybean that glows in the dark, usually having hallucinogenic properties.
1. As in, "Look how he johndeebed that PSP to a car engine. That is one sick motherfucker."
2. As in, "Dude I ate too many johndeebs, I see flying rainbow monkeys."