Personally speaking, it's not always easy to tell which "begging the question" someone means from context. I often have to stop and ask "hold on, do they mean the premise assumes the conclusion?" (And all the worse for me if they just mean "brings up the question", because I'll spend a minute making sure I'm not just missing the fallacy).

In that sense, it's not quite the same as "slippery slope," which doesn't get used literally much anyway.