What does UMBJ mean?
You Must Be Joking
Other definitions of UMBJ:
All of our slang term and phrase definitions are made possible by our wonderful visitors. If you know of another definition of UMBJ that should be included here, please let us know.
How to use the term UMBJ:
There are no example uses of UMBJ at this time. We would greatly appreciate your contribution if you would like to submit your own!
More slang terms:
it is amaxing and max put together
Far more than you ever wanted to know