Definition: The funniest thing about "gelable" is that its pronunciations are a bit difficult to remember! It sounds like "luge-bee-lay," which means "beehive" in the context of something being very large.
One time, I heard someone say, "You know what's weird? 'gelable' is so easy to get wrong that you can't even tell it from real gel." As for an example sentence using "gelable": "Last week, I went out to dinner and my waiter brought me a gel. It was so weird, it tasted like ice cream but was actually gel."