The phrase "know ins and outs" typically means to have a thorough understanding of something. When looking for antonyms to this phrase, we can consider words or phrases that convey a lack of knowledge or understanding. Examples could include "clueless," "uninformed," "ignorant," "unaware," "novice," or "green." Alternatively, we could look for phrases that suggest a surface-level understanding or familiarity with a subject, such as "familiar with," "acquainted with," or "surface-level knowledge." Overall, antonyms for "know ins and outs" acknowledge a lack of expertise or insight into a topic.