What Does DUPE Mean? (Using DUPE Online)DUPE means "Duplicate".
Definition for DUPEDUPE means "Duplicate". This is the most common definition for DUPE on Snapchat, WhatsApp, Facebook, and Twitter. Here is some more information about DUPE:
2: Quite easy to guess
Adults and Teenagers
Using DUPE on a Cell Phone (SMS Texts, Whatsapp, and Yubl)