Toto meaning in Nigeria

Ever since I visited Nigeria, I've heard lots of interesting slangs and phrases. Another one I hear people say a lot is TOTO. I asked a friend and he told me it is used to refer to the Vagina. Is that true?
 
Ever since I visited Nigeria, I've heard lots of interesting slangs and phrases. Another one I hear people say a lot is TOTO. I asked a friend and he told me it is used to refer to the Vagina. Is that true?
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