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1.
the quality or property of being ticklish.
Kim had to stop giving Chris a foot rub because of his ticklishness.
by Marty October 23, 2003
 
2.
When someone is uber (large amounts) ticklish.
Anna will never die of ticklishness, but Brandon will...or could. :)
by Anna the Coolest March 12, 2007
 
3.
The amount of tickle one feels.
I was born with high ticklishness.
by Big Beefy Mac Daddy December 22, 2010