What Does /W Mean? (Using /W Online)/W means "Whisper".
Definition for /W/W means "Whisper". This is the most common definition for /W on Snapchat, WhatsApp, Facebook, and Twitter. Here is some more information about /W:
5: Extremely difficult to guess
Adults and Teenagers
Using /W on a Cell Phone (SMS Texts, Whatsapp, and Yubl)