[let the chips fall where they may] {v. phr.} To pay […]

[let the grass grow under one's feet] {v. phr.}, {informal} To […]

[let up] {v.}, {informal} 1. To become less, weaker, or quiet; […]

[let well enough alone] or [leave well enough alone] {v. phr.} […]

[let's don't] also [don't let's] {substandard} Let's not; let us not; […]

[let's have it] See: [LET HAVE IT].

[letdown] {n.} A disappointment; a heartbreak. * /It was a major […]

[letter] See: [CHAIN LETTER], [NIGHT LETTER], [TO THE LETTER].

[letter-perfect] {adj. phr.} Memorized perfectly; perfect to the last letter. * […]

[level] See: [ON THE LEVEL].