Slacklinning 

To urinate through the for-skin and not having the courtesy to 'cock-back' and revel the helmet for increased aim. Usually ending in a large amount of spray in all directions.

Dude, which one of you cucks was slacklinning!! There's piss all over the floor!

Slacklinning by Keith William October 17, 2016

slacklining 

The act of having an unbelievable amount of fun walking and doing tricks on a piece of one inch climbing webbing pulled tight between two points, also used as a form of meditation, physical and mental training.
See also: Slack

Hey Jim want to go slacklining?

slacklining by Adam Pudliner July 29, 2006

Slacklining 

The act of AWESOMENESS...
Jayrod Waters...
A unique way of life that scares the hell out of most...
Life...

Jayrod Waters IS slacklining.
Slacklining IS Jayrod Waters.

Slacklining by FrogWaters December 22, 2019