Arse gas 

Cloud of fetid colon vapour usually accompanying a fart. Should be invisible - note: if it is a brown and red spray that settles on the furniture, ceiling and walls then your digestive organs have exploded out of your arse pebbledashing your mum's living room with your intestinal blood and faeces.

Tommy's forever surrounded by a cloud of arse gas the stinky fudge slumper

Arse gas by kerouacfan March 8, 2011

arsegasm 

When someone has been unable to go to the toilet for multiple hours on end but when this person does the feeling of relief is orgasmic

there was no toilet on the jobsite so when i got home i had an arsegasm

arsegasm by geester July 1, 2014