lumbar,
as in the thing you can adjust in older car seats as a back support.
but in san fran, lumbar street is supposedly one of the hardest streets to navigate, cause it has all sorts of twists and turns and at the bottom of the steep hill there are flowers... I guess to mark peoples graves..
EDIT: next word is: cherry.
Note to self: Put something here.
2nd Note to self: Take over the world.
3rd Note to self: Get more blank notes.