Monk on 

When you are in a foul mood, due to the actions of some one else, or when a child can't get their own way.

I told Jonny he couldn't buy that rc helicopter, he got a right monk on!

Monk on by Naffito January 10, 2009

monk on 

to be pissed with sum1

he's got the monk on wit her

monk on by lulu May 14, 2003

Spunk on a monk 

The act of ejaculating on a bald religious man who lives in a monastery.

Strange person: Right, I'm off to the monastery to spunk on a monk now.

Spunk on a monk by Rob Heath February 11, 2006

Monkon 

Def: to be in an unsatisfactory or grumpy mood.

Bearing in mind how little one sees a monk smile, to have a 'monkon' is to be unhappy, to be in a monk.

"What's wrong with Derric?"
"Dunno, but he's got a hefty monkon."

Monkon by Joe Fleming February 10, 2005