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A person who is being particularly idiotic. Can also be used to describe someone whose behaviour is generally deemed ‘not okay’.

Almost always preceded by either the word ‘absolute’ or ‘complete’.
No one cares, you absolute mongbean!
mongbean by runnerbean November 9, 2021
Related Words
slick sexy salesman...or more commonly known as cheesepuff
at the end of the evening he became a sexy mongbean
mongbean by Lady K October 19, 2003
Name given to a rather sad little boy who has an unhealthy obsession for bowling pins and their many uses.
Oh, Your such a Mongbean!
Mongbean by Stef May 5, 2004
Formally known as Trevor Chie, Mongbean has a bukakke face problem where people find it necessary to Mazz on his face. So from this day forth, all people who have a problem with randoms Mazzing on their faces should be known as Mongbean.
Someone just mazzed on his face, he's such a Mongbean!

mongbeast 

A fat retard with a mongy eye a high sense of self importance and an insatiable appetite for fried food..it is attached permantly to its mothers breast and urinates when unhappy
mongbeast by gubbageeber January 20, 2015

mungbean 

when two guys find a dead chick and one puts his mouth over her pussy and the other jumps on her stomach and it is what come out
Go eat a mungbean!
mungbean by Anonymous May 12, 2003