mouh bouh
In the process of atempting to say the phrase "my bad" but you are too drunk, high, or maybe even both to pronouce "my bad" in the correct manner. Therefor, being intoxicated, the words "mouh bouh" come out of your mouth.
Nick- Bro you spilt the bacardi all over my pool table
Jsteve- mehh... welll mouh bouh
Jsteve- mehh... welll mouh bouh