Top Definition
The sound made (a little like a duck's quack) when somebody does/says something stupid or is on the receiving end of some bad luck or event. Occasionally, the word can be repeated for extra effect.
Lauren: 'My grandma just died'
Laura: 'Mwak'

Laura: 'I just feel like my career is going nowhere'
Lauren: 'Mwak mwak'

Lloyd: 'I didn't know you could put foil in the fridge?'
Jess: 'Mwak mwak'
by Lord Lloyd Christmas November 05, 2010
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.