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verb. the term refers to the act of walking into a solid wall that was in plain view.
This term is taken from the platform number 9 3/4s which wizards run through in the harry potter series to get on the Hogwarts Express.
The act of "9 and 3 quartering" an object is often the result of being ridiculously and unreasonably stoned.
"Is Marisa gonna be alright? She ran into that wall pretty hard"

"Yeah, she 9 and 3 quartered that bugger."
by sarahtheoriginator January 07, 2009
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