Answer:
I have a name that's not mine and no one cares about me in their prime. People cry at my sight and lie by me all day and night.
I can sizzle like bacon. I am made from an egg. I have plenty of backbone but lack a good leg. I peel layers like onions but still remain whole. I can be long like a flagpole yet fit in a hole.
I will disappear every time you say my name.
I move without wings Between silken string I leave as you find My substance behind.
I fly when I'm on and float coming off.
No matter how little or how much you use me, you change me every month.