The noise a crispy well-cooked pizza crust makes when you break it. Indicates a delicious pie.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

The dried on patty of proteins left on the tip of a penis an hour or so after sexual activity. Often contains lint, hair, or whatever particles were adhered to it before fully drying. Often slightly painful and initially difficult to peel off. May come off more quickly when rehydrated with water.