slang Unpleasant; unfavorable. This rainy weather is so beasty—I'm sick of it.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
mod. [of a person] undesirable; yucky. (California.) You are like, so like, beasty!
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.