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1.
the term "mrph" is commonly used to replace a sigh, but can be used as a replacement for a lot of other expressive terms such as: "ugh" or "hmph"

"Mrph" can also be used with little to no meaning other than to just be a cute sound effect or and angry response, sometimes even an exaggerated whine. Really, its all about HOW you say it.
-Sammie, you're not allowed to eat chocolate because of your diabetes
-"mrph!"

or

I'm so tired....mrrrph!
by seriouslyDUDE September 20, 2009

Words related to Mrph

fml hmph meh sigh ugh
 
2.
Hey or other muffled exclamation.
Emma said "Mrph!" when she got bitten.
by meh September 05, 2003