Short spasms (usually less than a minute) of spewing lies undermining one's personal achievements and making those around the person feeling even more feeble with their pathetic accomplishments.
The original discovers assumed that these spasms were done on purpose, deliberate attacks on the esteem of others.
However, extensive observation of those with chronic Jenning Disease has proved that it is a serious medical condition
1)Person 1: look at all these african kids
Person 2:ugh.. i wish i were as skinny as them. im such a fatass sometimes
Person 1: stop jenning
2)When you have a 99% average and president of three clubs and councils at your school and you have volunteered at a third world country but worried about not getting hired at McDonalds.