Top definition
Originally meant to be 'model brain', this got mis-heard as 'monobrain' and has been classic banter ever since.
Hey mate, can I have a look at your monobrain?
by Barry June 04, 2004
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