Nouns

(n)crumba very small quantity of something“he gave only a crumb of information about his plans”, “there were few crumbs of comfort in the report”
(n)rotter, dirty dog, rat, skunk, stinker, stinkpot, bum, puke, crumb, lowlife, scumbag, so-and-so, git, scum baga person who is deemed to be despicable or contemptible“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’”
(n)crumbsmall piece of e.g. bread or cake

Verbs

(v)crumbcoat with bread crumbs“crumb a cutlet”
(v)crumbbreak into crumbs
(v)crumbremove crumbs from“crumb the table”