Definitions of FFR Terms

[Mangrapes]

Okay, I must ask...

Can we get a thread going wtih different definitions and/or abbreviations you people use when you talk about your games?

Example: Jacks - Jackhammer (what the hell is that though? Anyone got a pic?)

MA = ?

PA = ?

Cross-over = I've only seen a pic on it once before somewhere

and whatever other tings there are.. can't remember any right now