Top Definition
The unclear language one speaks when yawning
Adam: Gosh am so tired!
Becca: I know, you've been speaking yawnese all night.
by proffessor010 October 13, 2010
the incoherent language spoken when one tries to talk and yawn at the same time.
Emily tried to give me directions this morning, but she was so tired, I couldn't understand her Yawnese.
by MichiganJ March 26, 2009

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