The term "man straw" is relatively uncommon and there are limited synonyms available for this phrase. However, one possible alternative is "straw man," which refers to an argument that is misrepresented to make it easier to attack. Another option is "stubble," which is the short, prickly growth of facial hair that some men may sport. "Haystack" could be another synonym, which is a stack of hay or straw. Additionally, "straw boater" could also be used, which is a type of hat made of woven straw and traditionally worn by men in a formal setting.