lie low

fly low

To have one's fly (zipper) undone.

friends in low places

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

give the lie

To respond to an insult, accusation, or falsehood by saying the offender is lying, particularly in the context of provoking a challenge to a duel.

give the lie to

To reveal or prove (something) to be false; to refute.

hang low

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

high and low

Everywhere; all over the place.

I can't lie

To be honest, frankly, honestly.

I tell a lie

I am mistaken; I thought that what I said (or wrote) was true, but I have just realised that it is not.