to have a lot to do; to have one's work cut out

(figuratively) to start out, to cut one's teeth, to get started (in some activity, trade, job, etc.)

to be a sorry sight, to look pitiful

(informal) to put food on the table, to pay the bills, to pay the rent

(very informal) to fuck around; to fuck up

to make up the numbers

(informal, figuratively) to do the dirty work

(offensive, markedly vulgar) fuck you, go fuck yourself

to pose as a paragon of virtue; to play the saint; to act as if one were the salt of the earth; to pass oneself off as a good person

(figuratively) to make one's debut, to take one's first steps (somewhere)