snogaversary 

An anniversary for when two people first snogged each other.

"Nikki and i snogged each other for the first time on July 9th 2004 and so July 9th 2008 will be our fourth snogaversary"

snogaversary by Chris Scarratt July 3, 2008

Stagaversary 

An annual holiday for men to celebrate the anniversary of a stag party by leaving the confines of normal life behind and religiously obeying only three rules:

a) No-one is a stag;
b) Everyone is a stag; and
c) Everyone behaves like a stag

It is Doug's stagaversary this weekend, watch out

Stagaversary by Alan's beard May 21, 2013

Scrogaversary 

When it's the anniversary of the first time you banged your steady love that you are not married to.

Me and my baby celebrated our scrogaversary today.

Scrogaversary by L- hud August 25, 2022