v. to leave a meeting or event abruptly and before its termination with little or reason, especially when you are expected or even required to be in attendance.

Also can be used in the form "to pull a kacho."
"Jared was at the meeting, same as all of us, and then I looked up to discovered he'd totally kachoed."

"Crazy Bob -- he pulled a kacho and walked out of his own child custody hearing!"
by Benjjj June 22, 2005
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