tailgasm 

n. An orgasm received from inserting a finger into the anus of a man or woman. Also known as a whoasm.

I gave that whoaman the tailgasm of her life!

tailgasm by happygirl_1088 April 29, 2010

Trailgasm 

The euphoric high of flow state while running on a trail

The runner was experiencing a trailgasm as he/she navigated the technical singletrack.

Trailgasm by TrailMaster November 15, 2021