high and low

come hell or high water

Regardless of the hardships; no matter what difficulties may arise.

fly low

To have one's fly (zipper) undone.

friends in high places

Friends who have authority or influence and who can ensure that one's interests will be protected or furthered.

friends in low places

Friends who have underworld connections or are involved in shady underdealings.

get high

To intoxicate oneself with drugs or other substances.

get off one's high horse

To stop acting in an imperious, overbearing or bossy manner.

hang low

To droop or sag heavily; to remain at a low altitude.

hell or high water

Highly adverse circumstances; acts of God.