(informal, figuratively) to feel under the weather, to feel fragile

(figuratively, intransitive) to take to one's heels, to run for one's life

post-1990 spelling of être sur son trente et un

to be dressed to the nines, to be dressed to kill

(figuratively) to air one's dirty laundry in public, to wash one's dirty linen in public

(figuratively) by the sweat of one's brow

to put one's best foot forward, to show oneself in one's best light

no man is a prophet in his own country, no one is a prophet in their own land

(figurative) to show one's true colors, to show one's true stripes, to show one's true face

to live one's life, to follow one's path in peace and quiet, to go on one's way peacefully