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1.
to act crazy......dance crazily....dance like nobody is around. Either way it is a good thing
Oh my God Becky is going bananza.
by Bigred January 29, 2006
 
2.
To have sporadic unpredictable behaviour, energetic and hyper. Out of the ordinary, unlike anything else or non-stereotypical.

RaffleBananza, an upcoming NGO acting, non-profit charitable organisation is called such as their organisation does not use the same blueprints as any other organisation so to speak, their idea is bananza and they want you to have a bananza time whilst donating to 100's of 1,000's charitable causes.
"Your acting bananza!", "That is such a bananza idea!".
by RaffleBananza August 25, 2014