off (one's) nana

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off (one's) nana

old-fashioned slang Crazy, insane, or mentally deranged. Sometimes written as "off (one's) 'nana" to reflect the abbreviation of "banana." I think you've gone off your nana for giving up that cushy office job, but, hey, follow your dreams. Don't go off your 'nana, I only took the car out for a quick spin. My auntie likes to let people think she's off her nana, but she's actually incredibly clever and witty.
See also: nana, off

off your nana

mentally deranged. Australian
Nana in these idioms is probably short for banana ; compare with go bananas at banana.
See also: nana, off
References in periodicals archive ?
Address : Paschim Gujarat Vij Seva Sadan Off Nana Mava Main Road Laxminagar Rajkot 360004,
They sharpened up and moments later forced Japan to surrender possession inside their own half, Georgia Stanway held off Nana Ichese and threaded a ball to play in White and she found a lovely finish for a 14th-minute lead.
You are no longer in pain now my darl, I hope you are getting big cuddles off nana Maureen, she will look after you.