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1.
The act of flipping back and forth from web sites. Mostly being distracted and ADHD-ish.
I was typing in Blogger and in between paragraphs I'd iDual to Facebook.

Josh: Dude, you're kind of ADHD.
Kieth: Nah, man....just iDualing.
by LcknssMnstr September 08, 2011
 
2.
Used as a gender neutral honorific alternative to "ma'am" or "sir". I'dual or idual is short for "individual" which can also be used as a gender neutral title in the form of "Ind."
Excuse me, i'dual, may I help you find anything?
by MinimalistFish October 23, 2014