many hands make light work; united we stand, divided we fall; there is strength in numbers

(figuratively) to walk into the lion's den

carsickness

(vulgar, derogatory, figuratively) to think the sun shines out of one's arse, to think one's shit doesn't stink, to think one is the shit, to think one is hot shit (to be full of oneself, to think highly of oneself)

(informal, figuratively) to leave a room; to leave / (informal, figuratively) to get sacked, to get the sack, to find oneself out on one's ear

to pose, to strike a pose, to strike an attitude

(figuratively) to soft-pedal, to put the brakes on, to slow down, to go easy

to gather dust

(vulgar) Alternative form of le beurre et l'argent du beurre

to tell the difference between, to distinguish / to make a difference, to make a big difference