to sleep soundly, to sleep without a worry, to rest easy

A village in Quebec, Canada; Former name of Deux-Montagnes. (a town neighbouring the town Saint-Eustache and the lake Lake of Two Mountains)

(figuratively) to have one's feet firmly on the ground, to be realistic, to be practical, to be well-grounded

(figuratively) on the razor's edge, on a knife edge

(figuratively) to back the wrong horse

ahead of one's time

on a war footing / in fighting trim

(figuratively) to be on everyone's lips, to be the talk of the town, to be talked about by everyone

(colloquial) post-1990 spelling of sur son trente et un

to follow in someone's footsteps