noun. A disease where one is highly susceptible to tickling. Laughing induced, "heavy" tickles, are easily produced when applying pressure to overly sensitive "ticklish" areas. Most cases result in a pleasurable or exciting sensation. Although in some cases of relentless heavy tickling, a highly unpleasant sensation can occur.
Man, you are so easy to tickle.
I know. It is because I have ticklitis.