Beefcakes can be a fun and playful term to describe a muscular and attractive man, but sometimes you may need an antonym for this word. An antonym is a word that has the opposite meaning of another word. For example, skinny or thin could be antonyms for beefcakes. These words describe men who are slim rather than muscular. Other antonyms for the word beefcakes include "wiry," "lanky," "frail," "slender," "lean," and "skeletal." It all depends on the context and the intention behind the use of the word. Antonyms can be useful when trying to convey a different idea or image, so keep that in mind the next time you need to describe a man's physique.