Top Definition
What Harry Potter and his friends use to get from place to place when there's a global pandemic.
Harry: Let's go somewhere!

Ron: Can't, I've got the swine.

Harry: Not to worry, I've got swine floo powder!

Ron: YAYYYYY!!!!11111rotflolololololol!1!!111!
by pacmanawesomepants November 05, 2009
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