I commend tatters for the creativity @ 30 and if it provided a unique combination it would have got my vote. However, though spin/ride doesn't satisfy (5) with the possibility of rip/snide (an unpleasant person) lurking and no other reference to pride I'll pass on it (this time).
There are quite a few good acronyms but, for me, it's the type of clue that the necessary "usual" indicators tend to make obvious. So
mattrom @ 5