To beg the question is to use a circular argument to prove something, for example, "The best cars are VWs, because VW makes the best cars." It does not mean "raises the obvious question."
Sadly I know that what I type about it here will make little difference, since it has already taken root as a cliche to mean "raises the obvious question."
Even so I will continue to get irritated when I hear it.
And just for a fun: Logical Fallacies.
