Fuckaverssary 

A fuckaverssary is a year when you and bae fucked for the first time and you didn't date so this is the date that marks the start of your relationship.

You: Happy fuckaverssary Fabi!
him: Uhh... i guess there's gonna be some tension for the coming days

Fuckaverssary by urbanchick25 June 22, 2016

Fuckaversary 

The day you and your fuck buddy first fucked.

John "Why did Tim have to leave so suddenly?"
Bob "Its Mary and his fuckaversary"
John "Ohhhh"

Fuckaversary by Anynemous August 1, 2010

fuckiversary 

the anniversary of the first time you slept together.

Sarah: Yesterday was our fuckiversary. Our first date anniversary is next week.

Erica: Wow, you waited almost a year!

Sarah: Not exactly...

fuckiversary by EmmyJane January 13, 2008

Fuckiversary 

(Fuck-uh-verse-ary) The anniversary date of the first time you and a certain person fornicated.

N: "Really? It hasn't been that long since we started seeing eachother..."

D: "Yeah, it has, its been about three months... you forgot when we first fucked?"
N: "Shit, I forgot our fuck anniversary... our fuckiversary. Tomorrow, Fuckiversary begins."
D: "Ok, were the ... 21st of each month."

Fuckiversary by Nai Mig August 21, 2010

Fuckversary 

Any anniversary marking the first time you fucked. Significant especially for one-night-stands that unexpectedly turn into relationships.

Hey baby, guess what tonight is? It's our one-year fuckversary!

Fuckversary by Mr K December 16, 2006