x men is a universe in marvel

it’s also a group, some of the members are professor x, Jean grey and Storm

You might wanna think about changing that to X-women

They have alot of ex's.

(noun) The exit button, notoriously small for mobile game advertisements.

X on top is a term used when saying that you are not interested in anything else than a physical relationship and that you would not grow attracted to anyone giving you that.
The uses include but are not limited to:
1 a Greating
2 a Personal Message
3 a Good Bye
4 a Random Phrase

When you partner up with your friends ex girlfriend and he partners with your ex girlfriend in beer pong

refering to "X Protonium."