The phrase "blows grits" is colloquial slang used in Southern United States and is an idiom meaning to be completely worthless or useless. Synonyms for the phrase include "not worth a dime," "not worth a penny," "worthless," "useless," "ineffective," "futile," "pointless," "failed," "unsuccessful," and "unproductive." The phrase is often used to describe a situation or an object that fails to meet the expectations or standards, and it can also be used to describe someone who lacks skills or abilities. Identifying synonyms for "blows grits" can improve your vocabulary and help you express yourself more effectively when describing the ineffectiveness of something.