beastˈly adjective

1. Vile, disagreeable (informal)
2. Like a beast in actions or behaviour, bestial

1. Abominably, frightfully (informal)
2. Brutishly

beast fable noun

A story in which animals behave like humans

beastˈly-head noun (Spenser)

Personality or self of a beast

beast of burden noun

An animal, eg a donkey or bullock, used to carry or pull loads

beast of prey noun

One that devours other animals, esp higher animals, applied usu to the Carnivora

mark of the Beast

1. A stamp on the forehead or right hand of a worshipper of the Beast (Antichrist) as in the Bible, Revelation 13
2. Hence a sign of whatever was considered to be of the Antichrist, or (loosely) evil or even bad manners

number of the beast

666, the apocalyptic number

the beast with two backs

A man and a woman in the act of having sexual intercourse