Top definition
The 'Bukmonster' is a name given to a sneaky Japanese pervert who derives pleasure from publicly masturbating- whilst sneaking up on clueless girls and ejaculating on them, usually aiming for their faces.

See bukkake
Girl A: 'Oh Shit run it's the bukmonster!'
Girl B: (turns head) 'Where?'

**splat**
by Nolan Pettersen March 13, 2008
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug