The terrible disorder which causes one to blurt out uncontrollable fits of randomness online. Some things said during a fit of online touretteswill be completely uncalled for and may result in uncontrolled lawlz and rofl's.
Dan:Omg seriously Mark you gotta stop being such a....AIDS!!!!.
Mark:Wtf Dan......you def have online tourettes or some shit.
Dan:So I herd u liek mudkipz
When a hacker breaks into your computer and changes your sentences into mean things when you are IM-ing so that you seem like you have tourettes.
Say if you typed in "I like new haircut". The Online Tourettes hacker would type in," I HATE your UGLY haircut, its GAY!!