tail end
noun.
the time of the last part of something
the fag end of this crisis-ridden century|the tail of the storm
Synonym: fag end, tail
noun.
any projection that resembles the tail of an animal
Synonym: tail
noun.
the fleshy part of the human body that you sit on
he deserves a good kick in the butt|are you going to sit on your fanny and do nothing?
Synonym: arse, keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tooshie, tush, hindquarters, hind end, ass, backside, behind, bottom, bum, buns, butt, buttocks, can, derriere, fanny, fundament