Bananarita
Encyclopedia
The Bananarita is a variation of a margarita
Margarita
The margarita is a cocktail consisting of tequila mixed with orange-flavoured liqueur and lime or lemon juice, often served with salt on the glass rim. It is the most common tequila-based cocktail in the United States...

 with a banana liquor, however served in a cocktail glass (on the rocks).
This will taste like a semi-sour banana mix, you can also experiment with different mixers.
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