"I'll Try to Make It."

I hate this:

"Hey, I'm having a dinner party on Friday. Can you come?"

"I'll try my best."

or...

"There's a great concert on Friday. Wanna go?"

"I'll try."

What do people mean by 'I'll try'?

"I'll try to come, but I may not succeed. I might get hit by a bus or fall down a manhole. You never know, but I'll try."

It's such bullshit. What they really means is:

"I might come, unless I get another invitation from someone I like better or something more interesting comes up."

Same goes for the "Maybe" RSVP button on facebook. Either come or don't come, but don't give me this "maybe" shit. Death to that.