Top Definition
Easily one of the coolest people on the planet, he is regarded as a leading authority in the field of the front-to-back wiping technique
If you dont know by now, forget about it
by not iodan August 26, 2004
1 more definition
The backbone of a high school with the ability to solve any problem or make life hell. Though easily confused, the I/O has nothing to do with the role he plays during intercourse.
"Yo, what's up IOdan? My network is acting up again. Can your fine ass switch the routers and route the switches?"
by bariot December 22, 2004

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