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Somebody who thinks they know everything and know what they're talking about, when in all actuality, they know absolutely nothing. They tell everyone useless facts that they pulled out of their ass to try and sound smart. There is no convincing them that they are wrong.
Person 1: Did you know that if you eat poison oak leaves, you'll never get poison oak?

Person 2: Um... where the fuck did you hear that..

Person 1: uh... i read it.. in a book.

Person 2: Wow.. you're a fucking moolack.
Moolack by the anti-moolack group September 19, 2008
Related Words
Mowlacat occurs when AU boyz get together for a good time. Niyaz is often used as chase for hard liquor.
Yo, you coming for the mowlacat and Kamdar’s House?
mowlacat by Mowlacat99 May 12, 2018

moonacababa 

its the opposite of hakunamatata it means all worries for the rest of you life
Kid 1: Wow what a day
Kid 2: Oh my gosh no its not...
Kid 1: Moonacababa
person 1. Did you know water has calories?

person 2. No it doesn`t!

person 1. well why is it when you drink you weigh more

person 2. Omg only a fucking moolack would believe that!!!
Moolack by Spazisu July 17, 2011

Moolacka 

Greek for 'wanker'.
Moolacka: Mmmm.. Oohhh

Fergadés: Aye aye aye!! Moolacka!!! Out of my house!!!
Moolacka by Broose Lee February 10, 2014
The kid was a moolaka. The kid wasn't stupid, he just dosn't know any better.
moolaka by whiteback November 14, 2011