If you search for 'Banana Squash' in Korean, all you get are banana + sweet pumpkin smoothie recipes, but banana squash actually exists.

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You can't really get a sense of the scale just by looking at it like this,

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But you can see how huge it is when compared to a person (the photo is just for scale, so please refrain from any personal attacks on the person in the pic).

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The name is just because it looks like a banana; it doesn't actually taste like one. It just has a sweet squash flavor. Looks like it's usually sliced and roasted or used for baking things like pies. Personally, I don't think it looks that much like a banana, so I'm not sure who named it. Upvote if this was interesting/cool, or if you think OP is funny.