The condition of having such a huge crush on someone that you completely forgethow to do the simplest things.
Boy: You know we could have just used a different IM client to keep our private chats seperate from our work chats?
Girl: Jeez, we could have thought of that such a long time ago!
Boy: Don't worry, we have crush dementia, it's understandable.
When you wear jeans and your fat hangs over(muffin top).Its just another name for it.Just like the danimals yogurt cup.you squeeze it at the bottom and yogurt squeezes out.Just like the body shape you get from muffin top.