Top definition
When something is sooo smelly, its humbelievable!

A combination of humming and the smell actually being believable.
Tom: "Pwoooaaar, when did you clean this flat?"
Ben: "Yeah... I have not cleaned it for decades!"
Tom: "It's HUMBELIEVABLE"
by tphere October 07, 2011
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