it's in the bag

horse that has a white nose and the rest of its body another colour

(figuratively) to be up to your neck in trouble, to be up shit creek

(figurative, idiomatic) to have a frog in one's throat (be unable to speak freely)

to have a bun in the oven (to be pregnant; to be expecting a baby)

(figuratively) to make a little extra money, to top up one's income in order to live a bit more comfortably

(polite) what's your job?

plural of cheval qui boit dans son blanc

(science fiction) time machine

(figuratively) to be much mistaken, to bark up the wrong tree, to delude oneself, to need one's head examined, to have another think coming