for shits and grins

as ever trod shoe leather

Alternative form of as ever trod shoe-leather.

rain dogs and cats

Alternative form of rain cats and dogs.

like there is no tomorrow

Alternative form of as if there were no tomorrow.

test bed

Alternative form of testbed.

sing off the same hymn sheet

Alternative form of sing from the same hymnbook.

knock someone down with a feather

Alternative form of knock someone over with a feather.