i Register
In some senses, beastly is marked as dated, slang, UK. Watch for register when choosing this word.
adj
Pertaining to, or having the form, nature, or habits of, a beast.
Similar to the nature of a beast; contrary to the nature and dignity of human beings.
beastly culture
Abominable; very unpleasant; hideous.
beastly weather
Stop being so beastly to her!
Of computer hardware or motor vehicles etc.: ostentatiously powerful.
In addition to a Core i7-860 with a full-sized heatsink and 4GB of DDR3 RAM, the company showed its SUGO SG07 housing today's most beastly graphics card, the dual-GPU Radeon HD 5970, which is about 30cm long.
A very big, very black, and very beastly Hummer H2, Spotted in China in in the rain the great city of Zigong in Sichuan Province.
adv
Like a beast; brutishly.
Beastly he threwe her downe, ne car'd to spill / Her garments gay with scales of fish that all did fill.
They have insulted me most beastly. Moreover, they are, everyone of them, black-satan filthmen.