his, her, its, their, one's (when referring to a plural noun)

(informal) to pack one's bags and leave, to pack up and go, to march off bag and baggage

(figuratively) to roll up one's sleeves, to pull one's socks up

(figurative, informal, transitive with sur) to take it out on, to vent one's spleen on, to vent one's gall on

(euphemistic) to do one's business, to relieve oneself

to teethe / to cut one's teeth

to prove oneself, to prove one's worth, to win one's spurs, to earn one's stripes, to earn one's wings

(figuratively) to bear fruit, to pay off

to come round, to come to, to regain consciousness

to become flustered, to go to pieces