canciversary 

1. The one-year anniversary of one's successful cancer treatment (cancer + anniversary).

2. A reason for a really, really big party, preferably in a foreign city.

Hey, let's all rent a house together in Amsterdam for a weekend to celebrate our friend's canciversary.

canciversary by c_ho April 7, 2010

Chativersary 

The celebration of the day of your initial online contact via a dating site, a messenger service, etc etc.

OMG. I've been talking to Bob on match.com for 6 months today! It's our chativersary!!!

Hi SexyBod4238! Happy Chativersary! I got your this online flower bouquet and ecard!!

Chativersary by hawthorne1234 February 7, 2010

Caniversary 

The celebatory date that you got a much anticipated severence package from a job you hated or were planning to leave anyway.

"I thought I'd pick up some champagne and a cigar to celebrate my Caniversary - one year ago today!" said Terry.
"Screw You- I still can't believe you got 18 months salary to leave that piece of crap job especially when you were going to quit anyway!" said Larry.

Caniversary by bingo lingo January 24, 2010

canniversary 

A year from the date on which you were fired from a job.

"Next week is my canniversary from Enron!"

canniversary by seoladair February 5, 2009

canniversary 

The yearly celebration of a person's first time trying or enjoying cannabis in some form. Sometimes celebrated by sharing one's cannabis or paraphernalia with members of their smoking community (reddit.com/trees, for example). Can also be celebrated with cannabis-infused space cake with candles.

Also, just another reason to get together with your stoner friends and get baked. Not to be confused with 4/20, the annual holiday that celebrates pot culture in general.

Miles invites his stoner circle over to his house every year at 4:20 on July 5th to celebrate his canniversary with them. They usually bring him gifts of rolling papers, a dub sack, and next year, they're going to Amsterdam for his canniversary!

canniversary by Milesabove July 6, 2011

Centiversary 

Revolving mark of a Century. A Centiversary is like an Anniversary, only instead of being annual, it's centurial, or every 100 years.

In January of 2013, CalNORML and N.I.C.Events are hosting the first and LAST Centiversary Party of all time to mark the 100th year of Cannabis Prohibition in California, and hopefully the end of the Hundred Year War on Marijuana!

Centiversary by NIC CoughMan December 5, 2012