Slatterfest 

A celebratory gathering of friends in honour of Slatterfey. Traditionally held on/near December 13. A great feast is prepared and guests are invited to indulge in complementary greenery and giggle juice throughout the evening.

The first Slatterfest was a great success, nobody could believe the food was edible, let alone tasty!

Slatterfest by ameliaw December 28, 2018

Slatherfest

To slather Jif peanut butter all over one's body for sexual purposes. This can be done with a partner, in a group, or even by one's self. One can try this with Skippy or the generic brand, but the taste and consistency of Jif far surpasses these cheap substitutes. It has the unique ability to be able to go into cracks and crevices much better. A nice glass of cold milk should always be on hand when "Slatherfesting"
Slatherfests can get quite out of hand, The Valentine's Day Slatherfest of 2007 resulted in 12 hospitalizations.

"What did you do last night?"
"Dude, it was a slatherfest, I'll probably have Jif dingleberry for a week

Slatherfest by Nik Balash May 18, 2009

Splatterfest 

When one empties his/hers liquified bowels and it sprays all over the inner bowl and the upper rim of the toilet.

I had to use the bathroom, but I chose not to when I saw the person before left a splatterfest.

Splatterfest by MeNthisGuy August 31, 2011

shatterfast

A morning meal so large or otherwise extraordinary, it doesn't merely break your fast, it fucking shatters it.

I meant to eat a small breakfast, but by the fifth donut I realized I was having shatterfast instead.

shatterfast by Dr. Jones-Smith-Jimmy September 28, 2011