Wow. That guy sounds absolutely terrible. I can't believe he would actually steal your ideas without giving credit -- well, I believe you obviously, but that is a craptastically asshole thing to do! I'm totally indignant, I can't imagine how it would make you feel.

Your boss sounds so sucky. Wtf, adjust your attitude? That's the response he has after inviting you to -- presumably -- participate in the meeting??

Wow, humanity...