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flushing the toilet with your butt
Jamie! Don't use your index finger, butt flush it!
by Hot Box November 20, 2008
In poker, the second best flush possible given the situation.
I had the king high butt-flush, but he had the nuts.
by benofmn June 28, 2013
1. A next morning, hungover dump.
Tripp: "You ready? The party starts in 10 minutes"

Owen: "Dude, I'm still recovering from the butt flush I had this morning"
by GastoniaClamSlammer1 April 27, 2013