"High old time" is a colloquial term used to refer to a fun and exciting celebration or party. There are many synonyms for this phrase that can be used to describe a lively and enjoyable experience. Some common alternatives include "rip-roaring good time," "rollicking party," "fun-filled event," "festive gathering," "merry-making," and "jubilant occasion." All of these phrases convey a similar meaning, implying a cheerful and lively atmosphere where people are having a great time. Whether it's a wild night out with friends or a festive family gathering, any of these synonyms can be used to describe an unforgettable and enjoyable experience.