A couple that surface frequently particularly in professional theater settings... along with their translations...
"We can certainly have that conversation" - meaning, "say what you want, but nothing's gonna change and we're doing it my way."
After receiving a "note" or "adjustment" from a director, the expected, or at least always-given, response by the actor is "Perfect!" or "Awesome!", which usually translates to, "I have no idea what you're talking about."
"Raise the stakes" - "You're not overacting quite enough yet."