kummersault 

doing a backwards summersault while jacking off, and you bust a nut in your own face.

dude i totally busted a nut in my own face doing a backwards kummersault!

kummersault by lalalexi May 10, 2011

bummersault 

When a man inserts his stiff erection into another mans rectum and they form a ball and procede to roll down a hill.

bummersaulting is a fun and creative way to experience the environment in a sexual manner.

bummersault by Scott Jenkins June 22, 2006

Idaho Summersault 

An act in which a person who has just completed sexual intercourse summersaults off the bed for no fucking reason

George: It's not an IOWA summersault; it's an Idaho summersault!
Grace: I don't care what it is; don't ever do it again

Idaho Summersault by Spencer Ace August 26, 2019

Summersault 

An unexpected heat wave that assaults a city and renders its people helpless.

Delhi was chugging along fine, waiting for the rains, when a summersault hit it with temperatures crossing 111 Fahrenheit.

Summersault by Mohit Hira June 28, 2009

russian summersault

when two people are having 69 while rolling like a wheel down the streets of mosco

(in a Russian accent) "brother, the other day I vent to mother Russia capital and saw Yekaterina Putina
performing a Russian summersault"
"only in mother Russia my friend. now lets go drink Russia's nectur. TO THE VODKA!!!!!!!!!"

russian summersault by jason1234569 May 3, 2018

epsom summersaults 

If a room smells funny and has been mysteriously been repainted (any colour from 'mission brown'to 'avocado green' {what have you been eating?}) this is probably because someone was using "epsom summersaults".
This is an play on words of:
Epsom salts - A diarrhoeic agent.
Summersault - putting your head between your legs and rolling forwards.
It is used to describe a mess left behind in a bathroom, where someone has missed the bowl, left a skid mark or generally left feacal matter all over the carpet, walls, roof, furniture, dog or anything not covered in cling film.

Leaves the same mess as a Di-hurl, although not in unison

1: I've just been to the dunny, I think someone has been doing "Epsom summersaults".
2: Well, it was one hell of a party.
1: It looks like the shit hit the fan... Literally

Laugh Out Loud (provided you don't have to clean it up.)

epsom summersaults by 10secondspecial December 12, 2008