Top Definition
The sensation an individual feels after going for a distance run (7+ miles); usually consists of anything you have eaten but not passed since your previous runner's dump - most relieving feeling next to ejaculation.

Described as "nastay!"
Blaine: Dude, I just went for a 9 mile run!

Court: That must have been nice.

Blaine: Yeah, but my Runner's Dump after felt so much better! I finally got that cabbage out.

Court: You haven't had cabbage in a month...

Blaine: I know
by Bored Jedi May 07, 2011

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