X out

verb3

1. •
   To cross out with a series of the letter X, or with scribbles or lines.

   • On a close to final copy the title The Way We Die Now has Now Xed out and replaced with Today. Then Today is Xed out and Now is returned to its place. — 1997
2. •
   (informal) To close a window (typically by clicking a button marked with an X symbol).

   • When you have selected your desired settings, X out of the window and return to the document.
3. •
   (slang) To kill; cross out.