by Woody January 24, 2005

Contraction of "deal" and "yo."
"What's the dealio?" ("What's the deal, yo?")
by eurobikermcdog October 26, 2006

Popularized in a Missy Elliott song by the same name, the phrase "What the dealio?" is equivalent to "What's the deal?" or "What is up with this situation?"
What the dealio?
by Osh L November 29, 2002

by Elizabeth Crestw December 19, 1999

by UF Warren December 31, 2008

What a Contracting Officer uses in place of "deal" when he is trying to be cool (read: decidedly uncool).
by xtheowl September 14, 2006

"Popularized in a Missy Elliott song by the same name..."
Fucking tweens and 20 somethings need to stop applying retarded, wishful definitions to words that were around before their birth. "Dealio" was not popularized by missy elliot, as it has been used consistently 20+ years before her music career got off the ground.
Fucking tweens and 20 somethings need to stop applying retarded, wishful definitions to words that were around before their birth. "Dealio" was not popularized by missy elliot, as it has been used consistently 20+ years before her music career got off the ground.
by spankusmaximus October 27, 2010
