Top Definition
The incredibly stupid things you say when you are overly tired.
At around 1 am, Stephanie started telling knock-knock jokes and giggling. Mark told her she was talking yawnsense.
by kcitsleipztirf November 04, 2010
1 more definition
The degree of one's susceptibility to yawning after experiencing another's yawn.
His yawnsense was so acute, he would yawn after his next door neighbor yawned.
by Alden Andrews January 23, 2008

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