Antonyms for the phrase "drop dead gorgeous" include homely, plain, unattractive, ugly, and unsightly. These words describe a person with a less than appealing physical appearance. Someone who is homely may not be conventionally attractive, but they may have other admirable qualities that make them attractive in a non-physical sense. Plain, unattractive, and unsightly are more blatantly negative descriptors for someone's appearance, indicating a lack of beauty or appeal. Overall, these antonyms stand in stark opposition to the common phrase "drop dead gorgeous" which is used to describe someone who is stunningly beautiful.