This expression most likely originated in blacksmithing, where one hits the high spots on a piece of work to make it look more level (as opposed to being truly level), in the same way that "hitting the high spots" while cleaning your room would make it look less shabby, though not necessarily totally clean.
The origin of the phrase is really not known, it seems to have appeared in about 1949/1950
Yes, it would modify a noun (e.g. spot, mark).
Which phrase does not come from the Preamble to the Constitution?
Dad has a secret fishing spot
Dad has a secret fishing spot
Achilles Heel
with its roaring fire
the weak spot in the crust where magma come to surface
"The weather is so hot."
"Jiminy Crickets, we are in a tight spot."
The phrase comes from FRENCH.
Picking flowers, do you love them or not, it NOT a phrase!