A cross fade is when you get a happy fade, and do something mean to it. For example, punching it in the nose, or insulting it's mother. It's also a type of fade used in movies, but that's different.
He was a very happy man, but then the scene crossfaded into a cross fade joining the area. It ruined the mood.
A key move used by savvy drinkers where you have about one quarter of your cocktail left as you approach the bartender for your next, as not to go bone dry. Similar to the DJ crossfade smooth transition from one song to the next by turning the volume down on the first song as it ends and up on the new song as it begins.
Pablo: Ya, it was his birthday and he was full on with the crossfade cocktail. Never had an empty. Melissa kept Drew happy to with a stay-cup. It was a great party that resulted in no target vomiting.