This is a question asked wile looking at an attractive female who is unknown to the voyer. The question is normaly asked (in a high pitched voice) to someone who deffinatly dosent know who the female is. Also the question is said loud enough where the female is heard by the voyer.
Attractive female walks by...
Male #1(to Male #2) whodat!!! (high pitched voice)

Male #2 I dont fucking know
by blankstrhhthggfhg September 26, 2009
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All of the New Orleans Saints fans, in all areas of the United States.

The members of the whodat nation will frequently yell "whodat" for no particular reason.
New Orleans Saints fan: "WHODAT! WHODAT! Whodat say they gonna beat them Saints."

Chicago Bears fan: "WTF did you say? Huh? Katrina should have swept you away... *starts cursing profusely and making more nasty Katrina remarks* "

Saints fan: "STFU - the Saints will demolish the Bears this year. The Saints will make your bears look like week koala bears smoking dope. As a proud member of the whodat nation I hereby bitch slap you - *POW* - WHODAT!"

by Adel7 August 30, 2007
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