(noun)
1: When you make somebody else yawn with the dreaded "yawns are contagious" and physical yawn combo.
2: When you have yawned so much already that every
time you think of not yawning you yawn.
3: When you are not
tired but the act of seeing somebody else yawn suddenly makes you feel sleepy.
4. Whilst attempting an
Epic Yawn on somebody, everyone else around the aforementioned somebody subconsciously registers the yawn and yawns too.
5. When you read this, just seeing the word 'yawn' so many times makes you yawn.