The phrase "old onetwos" is often used to refer to outdated or obsolete things. Some synonyms for this phrase include archaic, antiquated, dated, ancient, past it, old-fashioned, outmoded, and passe. These words all convey a sense of something that has been around for a long time and is no longer relevant or useful in modern times. Other synonyms for "old onetwos" could include out-of-date, obsolete, relic, vintage, and obsolete. No matter how you choose to describe something that is no longer current or useful, these synonyms will help you effectively communicate your message and avoid sounding too repetitive.