deadbeat

ˈdɛdbiːt

noun

an idle, feckless, or disreputable person.

a nation of deadbeats who must work harder

layabout,loafer,lounger,idler,waster,wastrel,good-for-nothing,parasite,useless article,bum,scrounger,sponger,sponge,freeloader,skiver,cadger

adjective

completely exhausted.

I must go to bed—I’m dead beat