Crumpet buttering 

The act of ruining one's day exponentially and causing them anguish. Usually by denying a privilege or breaking a personal item. Sometimes just being a general annoyance to someone.

"That really was a crumpet buttering you gave him earlier."

Crumpet buttering by Trauchen Voodenschtampfern 3rd March 29, 2020

Buttering the crumpet 

to ejaculate semen onto a partners anus

after gaining my brown wings, i enjoyed buttering the crumpet

Buttering the crumpet by Ginger kite sack June 14, 2011

Buttering the Crumpets 

When you cum while pooping at the same time and the cum is spread on the poop before it hits the water. The penis may also be used as a buttering knife.

Yo' Derek what are you going to do later?
Probably just go home, drink a few beers, and try to butter the crumpets again.
What? Yo, buttering the crumpets is easier when you don't drink.

Buttering the Crumpets by poopbutter August 21, 2013