1 definition by koalabearwuvsmad

Top Definition
the act of jumping on someone, whether they do or do not know. they may hold you or flail their arms trying to get you off. in the act of koala you hang on with all your might and just hang there.
"woah, did you see courtney just koala maddy!"
by koalabearwuvsmad April 22, 2009

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