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Wiktionary
banana split

n. 1 A dessert or sundae containing a banana cut in half lengthwise (split), ice cream and various toppings which may include sauces, nuts or fruit. 2 (euphemistic form of bullshit dot= English) ''(especially in the card game sense)''.

WordNet
banana split

n. a banana split lengthwise and topped with scoops of ice cream and sauces and nuts and whipped cream

Wikipedia
Banana split

A banana split is an ice cream-based dessert. In its classic form it is served in a long dish called a boat. A banana is cut in half lengthwise (hence the name) and laid in the dish. There are many variations, but the classic banana split is made with scoops of vanilla, chocolate and strawberry ice cream served in a row between the split banana. In no particular order, pineapple, strawberry and chocolate sauces are spooned over the strawberry, chocolate, and vanilla ice cream. It is garnished with crushed nuts, whipped cream, and maraschino cherry.