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4.
The combination of flannel and plaid. Worn by math geeks only.
This flaid won't do, there's no room for my pocket protector.
by parental concern July 05, 2005
 
1.
1. A disease caught from a friend who's surname is Fletcher.

2. Fletcher aids.
I wouldn't drink that water if I were you, I've got flaids.
We went to Edinburgh and all got flaids.
by Maximator June 26, 2011
 
2.
Flaids- having the flu and aids at the same time.
Kenna has a really bad case of the flaids.
by Blaskitballr February 24, 2014
 
3.
The combination of Influenza and Acquired Immune Deficiency Syndrome (AIDS). Essentially as deadly as AIDS but is spread as easily as the Flu.
Damn, Ana just coughed on me, I hope she doesn't give me Flaids!
by Steven A. March 24, 2007
 
5.
An undiscovered, non-proven and childish word for AIDS that is contained within a fly. Full meaning: Fly Aeroimmune Defficiency Syndrome. Thought to have a relation to cooties.
Watch out for that fly! It might have FLAIDS!
by FLAIDSman November 23, 2010