The term "come-on" generally means an attractive proposition, an enticement, or a seductive offer. However, there are several antonyms for the word "most come-on" that suggest the opposite connotation. For instance, "turn-off," "repellent," and "deterring" are antonyms that denote something unattractive, unappealing, or unappealingly forward. Other antonyms for "most come-on" could be "discouraging," "dissuasive," and "off-putting," which imply the action of dissuading or hindering someone from pursuing a certain course of action. Additionally, "unimpressive" and "unexceptional" could also serve as antonyms, meaning that the proposition fails to leave a remarkable impression on the receiver.