Top Definition
An expression of extreme surprise with strong South-East Asian roots. Best if said with a Singaporean/Malaysian accent. Alternative spellings include "Wah Lau" and "Wa Lau". The infamous Luncaster can often be heard exclaiming "Wallau" for trivial reasons.
1) Wallau! Your mom is so hot!
by Andrew Tong-Goh-Kim October 09, 2006
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.