Top Definition
the action of one's significant other who tears apart the group of friends.
"Dude. Adam never hangs out with his old friends anymore."

"Yeah. Once Susie came in she just started Yoko Onoing the shit outta them."
by Phil Jacklin October 07, 2007
screaming cacophonous death caws at the top of your lungs with an incomprehensible sense of self-assurance.
Mary got on stage at the high school talent show, but instead of singing a real song she just started Yoko Onoing.
by exoplanet February 16, 2015
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