A picnic at which more than three people vomit.
"The mayonnaise was bad, and the company picnic turned into a sicknic really fast."
by Aaaooo! April 4, 2004
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Something that is so cool/rad it is beyond sick.
That picture of you skydiving headdown is so badass, it's sicknice.
by Freeflier45 June 7, 2011
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