Example : Only a rotter would do that.
Kill the rat.
Throw the bum out.
You cowardly little pukes!.
The British call a contemptible person a `git'.

Synonyms : crumb, dirty dog, git, lowlife, puke, rat, rotter, scum bag, skunk, so-and-so, stinker, stinkpot

Example : A homeless tramp.
He tried to help the really down-and-out bums.

Synonyms : hobo, tramp

Example : A lazy bum.

Synonyms : do-nothing, idler, layabout, loafer

Example : He deserves a good kick in the butt.
Are you going to sit on your fanny and do nothing?.

Synonyms : arse, ass, backside, behind, bottom, buns, butt, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tail end, tooshie, tush

Synonyms : cheap, cheesy, chintzy, crummy, punk, sleazy, tinny

Synonyms : cadge, grub, mooch, sponge

Example : Her son is just bumming around all day.

Synonyms : arse about, arse around, bum about, bum around, frig around, fuck off, loaf, loll, loll around, lounge about, lounge around, waste one's time