1. (noun) An alternate name for the Xbox
2. (verb) When a person you are dating or otherwise hooking up
with (usually male) invites you over under the guise of playing video games and/or watching movies, but implicitly for the purpose of hooking up.
1. "I spent most of winter vacation holed up in my apartment playing some seXbox; it was lame."
2. "Whatever happened to you and that Ryan guy?"
"We used to go out sometimes, but after a while he was just seXboxing me and I stopped going over to his place to 'hang out.'"