Something that sounds like it will be incredibly awesome but lets you down. Comes from an experience with Wells Banana Bread Beer. Sounds great, doesn't it?
Man, that Nuclear Death Star Firework sounds great! Let's light it up! ........... Damn, it's a friggin' banana bread beer - 10 seconds of fountain and no boom.
When describing a time or distance, or both at the same time a single unit of measure should be used. The unit of banana can be used to describe a time, a distance or even a rating scale for hotness of people.
That walk is so long it must take 339 bananas to get there. I cannot believe it took me 87 bananas long to finish that pizza.
Me: I'd rate him about 455 bananas.
Friend: Damn girl he must be hot!!!