Lewis & Short gives the following definition:
surely, certainly, to be sure, by all means, indeed, in fact
certainly, indeed, forsooth
for, for in fact
for, because, inasmuch as
for indeed, since in fact, inasmuch as
as one in fact who, which, that, since or inasmuch as I, thou, he, it
which, to be frank, I find completely unhelpful when trying to write in Latin.
The best I can come up with is that "quippe blah blah blah" is generally used to mean something like "since, of course, blah blah blah."
Eum reliqui, quippe in Tartarum intrare non poterat.
I left him behind, since of course he couldn't enter Tartarus.
Mansi, quippe qui eum in Tartarum comitari non possem.
I stayed, since of course I couldn't accompany him into Tartarus.
That seems like it would work with all the examples given in Lewis & Short, even the ironic speech of Juno's from the Æneid.
Is this the right way to think about what quippe means and how it's used? If not, what would be a better way? Does it have any additional meanings/uses?