Edited Date/Time:
I was bored at work today and thought this would be a fun topic to discuss.
I've heard people use various terms when describing different jump combinations on a MX/SX track and I also see the argument come up a lot about if a single-table-single is considered a quad or triple. So I thought it would be fun to see how everyone describes different jump combinations to see if we are all on the same page, a few pages apart or in an entirely different chapter from each other.
The picture and jump descriptions below are commonly used in my inner circle and some of them I'm sure are pretty universal.
For #12 and #13 - I think you can consider a single-table-single a quad in certain situations although that could be confusing to some. I would call it a quad if it's a stretch to get over and the spacing is larger than a regular triple jump but if riders are able to jump it with ease, I would probably consider it a triple.
And joking about #25 of course!