To perform a difficult and thankless task.

plural of upright man

(archaic, UK, thieves' cant) The leader of a group of thieves or vagrants. / Used other than figuratively or idiomatically: see upright, man.

Alternative form of upright man

plural of rear admiral (upper half)

plural of upper esophageal sphincter

plural of upside down fridge

plural of upsilon meson

plural of upholsterer bee

plural of upsilon particle