What does Aup AUP AUP aup aup mean? March 24, 2017 All Dictionary Aup AUP AUP aup aup meaning in Urban Dictionary 1. To state Hello2. An amiable greeting Another Ineffective Post Acceptable utilize PolicyTerms and circumstances you need to accept before making use of whatever it is presuming. Both up and down when someone says that which you say "aup"